EVERYTHING ABOUT KS2 SCIENCE

Question 1

Define photosynthesis.

Answer 1

The process by which green plants use sunlight to synthesize food from carbon dioxide and water.

Question 2

What is the function of the roots in plants?

Answer 2

To anchor the plant and absorb water and nutrients from the soil.

Question 3

True or false: Mammals lay eggs.

Answer 3

FALSE

Most mammals give live birth, except for monotremes like the platypus.

Question 4

Fill in the blank: The Earth’s atmosphere is primarily composed of _______.

Answer 4

Nitrogen

Question 5

What is a food chain?

Answer 5

A sequence that shows how energy and nutrients flow from one organism to another.

Question 6

Define habitat.

Answer 6

The natural environment where an organism lives and grows.

Question 7

What is the water cycle?

Answer 7

The continuous movement of water through evaporation, condensation, and precipitation.

Question 8

True or false: Invertebrates have a backbone.

Answer 8

FALSE

Invertebrates include insects, worms, and jellyfish.

Question 9

Fill in the blank: Carnivores primarily eat _______.

Answer 9

Meat

Question 10

What is the function of leaves?

Answer 10

To perform photosynthesis and exchange gases with the environment.

Question 11

Define ecosystem.

Answer 11

A community of living organisms interacting with their physical environment.

Question 12

What are renewable resources?

Answer 12

Natural resources that can be replenished naturally over time.

Question 13

True or false: Reptiles are warm-blooded animals.

Answer 13

FALSE

Reptiles are cold-blooded and rely on external heat sources.

Question 14

Fill in the blank: Fungi absorb nutrients through _______.

Answer 14

Decomposition

Question 15

What is the function of the heart?

Answer 15

To pump blood throughout the body, supplying oxygen and nutrients.

Question 16

Define gravity.

Answer 16

The force that attracts a body toward the center of the Earth.

Question 17

What is a solid?

Answer 17

A state of matter with a definite shape and volume.

Question 18

True or false: Gases have a fixed volume.

Answer 18

FALSE

Gases expand to fill their container.

Question 19

Fill in the blank: The sun is a _______ star.

Answer 19

Medium-sized

Question 20

What is the function of the stomach?

Answer 20

To break down food using acids and enzymes.

Question 21

Define magnetism.

Answer 21

The force exerted by magnets when they attract or repel each other.

Question 22

What is a chemical reaction?

Answer 22

A process where substances combine or break apart to form new substances.

Question 23

True or false: Atoms are the smallest unit of matter.

Answer 23

TRUE

Question 24

Fill in the blank: Sound travels fastest through _______.

Answer 24

Solids

Question 25

What is the **function** of the lungs?

Answer 25

To facilitate gas exchange, taking in oxygen and expelling carbon dioxide.

Question 26

Define **pollination**.

Answer 26

The transfer of pollen from male to female parts of flowers for reproduction.

Question 27

What is a **mixture**?

Answer 27

A combination of two or more substances that retain their individual properties.

Question 28

True or false: **Oxygen** is necessary for combustion.

Answer 28

TRUE

Question 29

Fill in the blank: **Ice** is the solid form of _______.

Answer 29

Water

Question 30

What is the **function** of the brain?

Answer 30

To control body functions and processes information.

Question 31

Define **biodiversity**.

Answer 31

The variety of life in a particular habitat or ecosystem.

Question 32

What is a **producer** in an ecosystem?

Answer 32

An organism that makes its own food, typically through photosynthesis.

Question 33

True or false: **Earthworms** improve soil fertility.

Answer 33

TRUE

Question 34

Fill in the blank: **Carbon dioxide** is produced during _______.

Answer 34

Respiration

Question 35

What is the **function** of chlorophyll?

Answer 35

To absorb sunlight for photosynthesis in plants.

Question 36

Define **habitat destruction**.

Answer 36

The process by which natural habitat is rendered unable to support the species.

Question 37

What is a **decomposer**?

Answer 37

An organism that breaks down dead organic material, recycling nutrients.

Question 38

True or false: **Plants** can reproduce without seeds.

Answer 38

TRUE ## Footnote Some plants reproduce through cuttings or runners.

Question 39

Fill in the blank: **Wind** is a form of _______ energy.

Answer 39

Kinetic

Question 40

What is the **function** of the skin?

Answer 40

To protect the body and regulate temperature.

Question 41

Define **insulator**.

Answer 41

A material that does not conduct electricity or heat well.

Question 42

What is a **symphony** in terms of sound?

Answer 42

A complex musical composition for a full orchestra.

Question 43

True or false: **Electricity** can flow through all materials.

Answer 43

FALSE ## Footnote Conductors allow electricity to flow, while insulators do not.

Question 44

Fill in the blank: **Gravity** keeps us _______ to the Earth.

Answer 44

Grounded

Question 45

What is the **function** of the kidneys?

Answer 45

To filter waste from the blood and produce urine.

Question 46

Define **ecosystem balance**.

Answer 46

The state where species and resources are in equilibrium within an ecosystem.

Question 47

What is a **herbivore**?

Answer 47

An animal that primarily eats plants.

Question 48

True or false: **Fossils** provide evidence of past life.

Answer 48

TRUE

Question 49

Fill in the blank: **Light** travels faster than _______.

Answer 49

Sound

Question 50

What is the **function** of the liver?

Answer 50

To process nutrients and detoxify harmful substances.

Question 51

Define **pollutant**.

Answer 51

A substance that contaminates the environment and causes harm.

Question 52

What is a **consumer** in an ecosystem?

Answer 52

An organism that eats other organisms for energy.

Question 53

True or false: **Algae** are classified as plants.

Answer 53

FALSE ## Footnote Algae are simple aquatic organisms, not true plants.

Question 54

Fill in the blank: **Photosynthesis** occurs in the _______ of plants.

Answer 54

Chloroplasts

Question 55

What is the **function** of the pancreas?

Answer 55

To produce enzymes and hormones that regulate blood sugar.

Question 56

Define **climate change**.

Answer 56

Long-term alteration of temperature and typical weather patterns in a place.

Question 57

What is a **carnivore**?

Answer 57

An animal that primarily eats other animals.

Question 58

True or false: **Seeds** can remain dormant for years.

Answer 58

TRUE

Question 59

Fill in the blank: **Electric circuits** require a _______ to flow.

Answer 59

Closed loop

Question 60

What is the **function** of the spleen?

Answer 60

To filter blood and help fight infections.

Question 61

Define **niche**.

Answer 61

The role or function of an organism within its ecosystem.

Question 62

What is a **sustainable resource**?

Answer 62

A resource that can be used without depleting it for future generations.

Question 63

True or false: **Coral reefs** are made of living organisms.

Answer 63

TRUE

Question 64

Fill in the blank: **Thermal energy** is related to _______ of particles.

Answer 64

Movement

Question 65

What is the **function** of the gallbladder?

Answer 65

To store and concentrate bile produced by the liver.

Question 66

Define **endangered species**.

Answer 66

A species at risk of extinction due to habitat loss or other factors.

Question 67

What is a **symbiotic relationship**?

Answer 67

A close interaction between two different species, often benefiting both.

Question 68

True or false: **Bacteria** can be both harmful and beneficial.

Answer 68

TRUE

Question 69

Fill in the blank: **Sound waves** travel through _______.

Answer 69

Mediums

Question 70

What is the **function** of the thyroid gland?

Answer 70

To regulate metabolism and energy levels.

Question 71

Define **natural selection**.

Answer 71

The process where organisms better adapted to their environment tend to survive.

Question 72

What is a **keystone species**?

Answer 72

A species that has a disproportionately large effect on its environment.

Question 73

True or false: **Insects** are the most diverse group of animals.

Answer 73

TRUE

Question 74

Fill in the blank: **Thermal expansion** occurs when materials _______.

Answer 74

Heat up

Question 75

What is the **function** of the small intestine?

Answer 75

To absorb nutrients from digested food.

Question 76

Define **biome**.

Answer 76

A large geographical biotic unit, a major community of plants and animals.

Question 77

What is a **trophic level**?

Answer 77

The position an organism occupies in a food chain.

Question 78

True or false: **Ecosystems** can be both terrestrial and aquatic.

Answer 78

TRUE

Question 79

Fill in the blank: **Matter** can change states: solid, liquid, and _______.

Answer 79

Gas

Question 80

What is the **function** of the large intestine?

Answer 80

To absorb water and form waste for elimination.

Question 81

Define **adaptation**.

Answer 81

A characteristic that improves an organism's ability to survive in its environment.

Question 82

What is a **fossil fuel**?

Answer 82

A natural fuel formed from the remains of ancient organisms, like coal and oil.

Question 83

True or false: **Photosynthesis** occurs only at night.

Answer 83

FALSE ## Footnote Photosynthesis occurs during daylight when sunlight is available.

Question 84

Fill in the blank: **Nutrients** are essential for _______ growth.

Answer 84

Healthy

Question 85

What is the **function** of the bladder?

Answer 85

To store urine before it is excreted from the body.

Question 86

Fill in the blank: **Ecosystems** consist of living and _______ components.

Answer 86

Non-living