Science: How do we stay alive? Review

What do plants need to make their own food?

• Oxygen, water, and sunlight

• Carbon dioxide, water, and sunlight

• Soil, sugar, and oxygen

• Carbon dioxide, sugar, and chlorophyll

What do plants produce during photosynthesis?

• Sugar and soil

• Sunlight and energy

• Oxygen and sugar

• Carbon dioxide and water

Which part of the plant is responsible for photosynthesis?

• Roots

• Stems

• Leaves

• Flowers

Why do leaves look green?

• They reflect blue light

• They contain sugar

• They contain chlorophyll

• They are full of oxygen

Why are trees important to humans?

(Select the most important answer)

• They make shade

• They produce oxygen

• They use up oxygen

• They eat carbon dioxide

What adaptation helps a cactus survive in the desert?

• Thin roots

• Sharp thorns

• Broad leaves

• Red flowers

What is an example of a plant adaptation?

• Colorful flowers

• Being planted in soil

• Growing in sunlight

• Leaves that store water

What does the heart do in the circulatory system?

• Pumps blood around the body

• Fights diseases

• Creates oxygen

• Absorbs nutrients

What is the function of most arteries?

• Carry blood to the lungs

• Carry blood away from the heart

• Pump blood

• Filter blood

What is the main function of the respiratory system?

• Control movement

• Digest food

• Pump blood

• Help us breathe