Exploring the World of Science

H

• H2O2

• H2O

• O2H

• H2O3

• A

What is the process by which plants make their food?

• Photosynthesis

• Respiration

• Transpiration

• Digestion

What is Newton's second law of motion?

• F = ma

• F = mv

• F = m + a

• F = m/a

What is the powerhouse of the cell?

• Nucleus

• Ribosome

• Endoplasmic Reticulum

• Mitochondria

What is the main gas found in the Earth's atmosphere?

• Helium

• Oxygen

• Carbon Dioxide

• Nitrogen

What is the difference between speed and velocity?

• Speed is scalar; velocity is vector (includes direction).

• Speed can be negative, while velocity cannot.

• Speed is always greater than velocity.

• Velocity measures distance only, not direction.

What is the law of conservation of mass?

• Mass is lost during physical changes.

• Mass can be created in chemical reactions.

• Mass is conserved in chemical reactions; it cannot be created or destroyed.

• Mass is only relevant in biological processes.

What is the primary function of the respiratory system?

• To aid in digestion of food.

• To regulate body temperature.

• To facilitate gas exchange (oxygen and carbon dioxide).

• To produce hormones for growth.

What is the pH level of pure water?

• 6

• 7

• 8

• 5

What is the theory of evolution by natural selection?

• The theory of evolution claims that organisms can change their traits at will.

• Natural selection is the process by which organisms become extinct over time.

• The theory of evolution by natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

• The theory of evolution states that all species were created simultaneously.