Life Science Learning Quizzes for Second Graders

Question 1

Which of these is not a living cell?

Accepted Answer

Rock

Answer

Plant cell

Answer

Animal cell

Answer

Bacterial cell

Question 2

Animals have special features that help them survive in their environment. What are these special features called?

Accepted Answer

Adaptations

Answer

Skills

Answer

Traits

Answer

Abilities

Question 3

How do cells help our bodies grow and fix themselves?

Accepted Answer

Cells split into new cells to help us grow and heal.

Answer

Cells just get bigger as we grow and heal.

Answer

Our bodies make new cells from the food we eat.

Answer

Our bodies don't need new cells to grow or heal.

Question 4

How do differences between animals of the same kind lead to changes in that kind of animal over time?

Accepted Answer

Animals with traits that help them survive are more likely to have babies that inherit those traits.

Answer

All animals of the same kind are exactly the same.

Answer

Changes in the environment don't affect animals.

Question 5

How do our bodies create different types of cells, like skin cells, bone cells, and brain cells?

Accepted Answer

Cells change into different types of cells based on their genes.

Answer

Cells are born different and never change.

Answer

Cells learn from each other and copy each other's appearance.

Answer

Cells change into different types of cells because they eat different foods.

Question 6

How do plants and animals use energy differently?

Accepted Answer

Plants use photosynthesis to make energy, while animals use cellular respiration to release energy.

Answer

Both plants and animals use photosynthesis to make energy.

Answer

Both plants and animals use cellular respiration to release energy.

Answer

Animals use photosynthesis to make energy, while plants use cellular respiration to release energy.

Question 7

Scientists have a special way of organizing living things into groups because they share similar traits. What is this way of organizing called?

Accepted Answer

Scientific Classification

Answer

Grouping

Answer

Sorting

Answer

Categorizing

Question 8

How do plants make their own food using sunlight?

Accepted Answer

Photosynthesis

Answer

Decomposition

Answer

Respiration

Answer

Fermentation

Question 9

How do scientists organize different living things into smaller groups?

Accepted Answer

By their shared traits and family history

Answer

By their size

Answer

By where they live

Answer

By how they look and their body parts

Question 10

How do baby animals get traits, like fur color or eye color, from their parents?

Accepted Answer

From genes

Answer

From the environment

Answer

From siblings

Answer

From grandparents

Question 11

In a plant cell, which part contains chlorophyll, the green stuff that helps the plant make its own food?

Accepted Answer

Chloroplast

Answer

Cell wall

Answer

Nucleus

Answer

Vacuole

Question 12

How do living things create new ones?

Accepted Answer

Asexual reproduction: One parent makes a copy of itself.

Accepted Answer

Sexual reproduction: Two parents join to make a new living thing.

Answer

Only asexual reproduction is used by all living things.

Answer

Only sexual reproduction is used by all living things.

Question 13

Scientists use observations and experiments to understand the world. How do they do this?

Accepted Answer

They make predictions based on what they observe and then test those predictions.

Answer

They only read books and learn what others have already discovered.

Answer

They just use their imaginations to come up with new ideas.

Answer

They don't need to make observations or do experiments, they can just believe whatever they want.

Question 14

How do human activities, like building houses and factories, affect the balance and stability of ecosystems?

Accepted Answer

They can harm or destroy habitats for plants and animals.

Answer

They can add new resources to ecosystems, making them healthier.

Answer

They have no effect on ecosystems.

Question 15

Which part of the cell's life cycle is NOT a stage of mitosis?

Accepted Answer

Interphase

Answer

Prophase

Answer

Metaphase

Answer

Telophase

Question 16

Which of the following is NOT a type of symbiotic relationship?

Accepted Answer

Competition

Answer

Mutualism

Answer

Commensalism

Answer

Parasitism

Question 17

Imagine genetic recombination as a puzzle. What pieces get mixed up and put back together in this puzzle? Why is this important for living things?

Accepted Answer

Genes from different parents get mixed up and put back together during reproduction.

Answer

Body parts get mixed up and put back together when an organism grows.

Answer

Cells get mixed up and put back together when an organism heals from an injury.

Answer

Food gets mixed up and put back together when an organism digests it.

Question 18

Which body part is a leftover from an ancestor that no longer has a purpose?

Accepted Answer

A human's appendix

Answer

A bird's wings

Answer

A cat's whiskers

Answer

A monkey's tail

Question 19

Which part is NOT found in a plant cell?

Accepted Answer

Bones

Answer

Nucleus

Answer

Cell membrane

Answer

Chloroplast

Question 20

Which animal below is considered a mammal?

Accepted Answer

Dolphin

Answer

Shark

Answer

Eagle

Answer

Snake

Question 21

What is the name of the process where plants use sunlight to make their own food?

Accepted Answer

Photosynthesis

Answer

Breathing

Answer

Evaporation

Answer

Digestion

Question 22

Who is the scientist known for developing the theory of evolution?

Accepted Answer

Charles Darwin

Answer

Albert Einstein

Answer

Isaac Newton

Answer

Marie Curie

Question 23

What is the smallest unit of life called?

Accepted Answer

Cell

Answer

Atom

Answer

Molecule

Answer

Organism

Question 24

Which part of the plant is green and uses sunlight to make food?

Accepted Answer

Leaves

Answer

Roots

Answer

Stem

Answer

Flowers

Question 25

What is the smallest part of a living thing called?

Accepted Answer

Cell

Answer

Atom

Answer

Organ

Answer

Tissue

Question 26

What do all living things need to stay alive?

Accepted Answer

They need food to survive.

Answer

They can speak.

Answer

They can fly.

Answer

They have fur.

Question 27

Who is known as the 'Father of Evolution'?

Accepted Answer

Charles Darwin

Answer

Albert Einstein

Answer

Isaac Newton

Answer

Marie Curie

Question 28

What does DNA do inside living things?

Accepted Answer

Stores information about the living thing.

Answer

Provides energy for the body.

Answer

Protects the body from disease.

Answer

Regulates body temperature.

Question 29

Which of the following is natural and can be replaced by nature?

Accepted Answer

Solar energy

Answer

Oil

Answer

Coal

Answer

Natural gas

Question 30

Which part of the plant makes its own food?

Accepted Answer

Leaves

Answer

Roots

Answer

Stem

Answer

Flowers

Question 31

What is the name of the process by which animals take in oxygen?

Accepted Answer

Respiration

Answer

Photosynthesis

Answer

Digestion

Answer

Excretion

Question 32

Which of the following is a type of animal that lives in water?

Accepted Answer

Fish

Answer

Bird

Answer

Cat

Answer

Dog

Question 33

What is the name of the force that pulls us down to the ground?

Accepted Answer

Gravity

Answer

Magnetism

Answer

Friction

Answer

Electricity

Question 34

Which of these is NOT a part of a cell?

Accepted Answer

Toothpaste

Answer

Nucleus

Answer

Cytoplasm

Answer

Ribosome

Question 35

What is the process by which animals eat and get the nutrients they need to survive?

Accepted Answer

Digestion

Answer

Respiration

Answer

Photosynthesis

Answer

Reproduction

Question 36

Which of these is alive?

Accepted Answer

A plant

Answer

A rock

Answer

A car

Answer

A book

Question 37

What are the tiny building blocks that make up all living things called?

Accepted Answer

Cells

Answer

Organs

Answer

Atoms

Answer

Molecules

Question 38

Which of these is NOT something that all living things do?

Accepted Answer

They are made of metal

Answer

They need to eat

Answer

They grow and change

Answer

They have babies

Question 39

What is the special process that plants use to make their own food called?

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Digestion

Answer

Circulation

Question 40

Which of these animals eats plants?

Accepted Answer

Giraffe

Answer

Lion

Answer

Snake

Answer

Dolphin

Question 41

What is the name of the process that passes traits from parents to their young?

Accepted Answer

Genetics

Answer

Evolution

Answer

Adaptation

Answer

Photosynthesis

Question 42

Which of these is a natural event that can affect living things?

Accepted Answer

Earthquake

Answer

Supermarket

Answer

Traffic jam

Answer

School

Question 43

Which of these is something that we can use over and over again, like the sun?

Accepted Answer

Sunlight

Answer

Oil

Answer

Coal

Answer

Plastic

Question 44

How do living things change over time?

Accepted Answer

Evolution

Answer

Reproduction

Answer

Adaptation

Answer

Photosynthesis

Question 45

How does natural selection help different kinds of living things change over time?

Accepted Answer

It helps living things with helpful traits survive and pass those traits on to their babies.

Answer

It makes all living things in a group exactly the same.

Answer

It stops new groups of living things from forming.

Answer

It only affects animals, not plants.

Question 46

When a fish helps a clownfish by cleaning it, what kind of relationship is this called?

Accepted Answer

Mutualism

Answer

Commensalism

Answer

Parasitism

Answer

Competition

Question 47

Which of these is not a living thing?

Accepted Answer

A stone

Answer

A flower

Answer

A bird

Answer

A mushroom

Question 48

Which part of a plant takes in water and nutrients from the soil?

Accepted Answer

The roots

Answer

The leaves

Answer

The stem

Answer

The flowers

Question 49

How do plants make their own food?

Accepted Answer

Photosynthesis

Answer

Breathing

Answer

Digesting

Answer

Multiplying

Question 50

Which animal has a backbone?

Accepted Answer

A fish

Answer

A worm

Answer

A spider

Answer

A jellyfish

Question 51

What is a food chain?

Accepted Answer

A way to show how living things depend on each other for food.

Answer

A list of all the animals and plants in an area.

Answer

A diagram of only the plants in an area.

Answer

A system that has no outside influences.

Question 52

How do animals break down their food?

Accepted Answer

Digestion

Answer

Breathing

Answer

Pooping

Answer

Making babies

Question 53

How do living things pass on their traits to their offspring?

Accepted Answer

Through DNA in their cells

Answer

By sharing food

Answer

Through the air they breathe

Answer

By drinking water

Question 54

What is the most important task of the immune system?

Accepted Answer

To protect the body from germs and viruses.

Answer

To help the body digest food.

Answer

To help the body grow.

Answer

To control the body's movements.

Question 55

How can science and technology help us learn about and solve real-world problems like climate change or diseases?

Accepted Answer

Science and technology can help us find and track real-world problems using special tools.

Accepted Answer

Science and technology can help us create new ways to prevent or fix real-world problems.

Answer

Science and technology can't help us solve real-world problems.

Question 56

What is the tiniest unit of living things called?

Accepted Answer

Cell

Answer

Atom

Answer

Tissue

Answer

Organ

Question 57

Which of these is NOT a kind of cell?

Accepted Answer

Virus cell

Answer

Plant cell

Answer

Animal cell

Answer

Bacteria cell

Question 58

What part of a cell controls how it works?

Accepted Answer

Nucleus

Answer

Mitochondria

Answer

Ribosomes

Answer

Golgi apparatus

Question 59

How do plants create their own food?

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Digestion

Answer

Excretion

Question 60

What is the term for the way living things change over time?

Accepted Answer

Evolution

Answer

Adaptation

Answer

Natural selection

Answer

Mimicry

Question 61

Which of these is NOT a factor that influences evolution?

Accepted Answer

Earthquakes

Answer

Having lots of babies

Answer

Having different traits

Answer

Passing on traits

Question 62

What do we call a series of living things that eat each other?

Accepted Answer

A food chain

Answer

An energy pyramid

Answer

A habitat group

Answer

An ecosystem web

Question 63

Which of these is a living thing?

Accepted Answer

A tree

Answer

A rock

Answer

A cloud

Answer

A metal spoon

Question 64

What is the smallest building block of life called?

Accepted Answer

A cell

Answer

An organ

Answer

A tissue

Answer

An atom