SCIENCE 4 QT

Who discovered the gravitational force?

• Thomas Edison

• Isaac Newton

• Galileo Galilei

• Marie Curie

What is the smallest and most functional unit of an organism?

• Organ

• Tissue

• Cell

• System

Which organ system helps in transporting oxygen and nutrients to the body cells?

• Digestive

• Circulatory

• Nervous

• Skeletal

What do plants use to make food during photosynthesis?

• Water, sunlight, and carbon dioxide

• Oxygen, sunlight, and soil

• Water, oxygen, and minerals

• Carbon dioxide, soil, and minerals

What kind of roots grow from leaves or stems and help plants cling to structures?

• Taproots

• Fibrous roots

• Aerial roots

• Lateral roots

Why is it important to wear protective gear when working or playing?

• To look good

• To protect the body and prevent injuries

• To make work easier

• To avoid sweating

What happens during a physical change?

• The material changes into a new substance

• The size or shape changes but the material stays the same

• The material disappears

• The material reacts chemically

Which is an example of a chemical change?

• Water freezing into ice

• Cutting paper into pieces

• Food spoiling or rotting

• Melting butter

How do decomposers help the environment?

• By making food for plants

• By breaking down dead plants and animals into nutrients

• By making animals grow bigger

• By cleaning the air

What is the role of the stomata in leaves?

• To store water

• To capture sunlight

• To allow exchange of gases

• To protect the leaf