SCIENCE 4 - Unit II. Living Things Review

What part of a plant absorbs water and minerals from the soil?

• Stem

• Leaf

• Root

• Flower

Which part of the plant supports the leaves and carries substances to and from the roots?

• Stem

• Leaf

• Flower

• Fruit

What do you call the process by which green plants make their own food using sunlight?

• Germination

• Respiration

• Photosynthesis

• Reproduction

Why are leaves called the “food factory” of the plant?

• They store food for animals.

• They absorb water from the soil.

• They make food for the plant using sunlight.

• They help the plant reproduce.

The heart belongs to which body system?

• Digestive

• Circulatory

• Respiratory

• Muscular

What is the main function of the circulatory system?

• To break down food

• To move air in and out of the lungs

• To pump blood and transport nutrients

• To give shape and support to the body

What system is responsible for breathing and gas exchange?

• Circulatory

• Respiratory

• Digestive

• Skeletal

The muscles that work automatically without our control are:

• Skeletal muscles

• Smooth muscles

• Cardiac muscles

• Voluntary muscles

What is the main function of the skeletal system?

• It helps the body move and gives shape.

• It breaks down food into nutrients.

• It controls breathing and circulation.

• It filters oxygen from the air.

Which organ takes in oxygen and releases carbon dioxide?

• Nose

• Heart

• Lungs

• Brain