YEAR 8 MID TERM SCIENCE EXAM

What is growth?

• The increase in size and mass of an organism

• The movement of an organism from one place to another

• The process of breaking down food for energy

• The reaction of an organism to stimuli

What is development in living organisms?

• The breakdown of food into nutrients

• The permanent change in structure and function of an organism

• The movement of an organism

• The breathing process of an organism

Which of the following is NOT a characteristic of growth?

• Increase in height

• Increase in weight

• Production of offspring

• Increase in the number of cells

What is the primary factor that affects growth in plants?

• Sound

• Water, sunlight, and nutrients

• Animal presence

• Human activities

Which factor does NOT directly affect growth and development in humans?

• Nutrition

• Genetics

• Exercise

• Daily temperature changes

What is the main function of proteins in growth?

• Provide energy

• Help in body repair and cell growth

• Store genetic information

• Control body temperature

Which of these statements is true about growth?

• Growth stops completely in adults

• All living things grow at the same rate

• Growth is irreversible in living organisms

• Growth occurs only in animals

What is a physical change?

• A change that produces a new substance

• A change that affects only the appearance of a substance

• A change that cannot be reversed

• A change that produces heat and light

Which of the following is NOT a physical change?

• Melting of ice

• Boiling of water

• Burning of wood

• Dissolving salt in water

What happens during a chemical change?

• The shape of a substance changes, but it remains the same substance

• A new substance is formed with different properties

• The substance changes its state but not its composition

• The substance expands and contracts