Praxis Science 7814 Questions and Answers Latest Version Graded A+

Praxis Science 7814 Questions and
Answers Latest Version Graded A+
What is the main function of roots in a plant?

A. To produce flowers


✔✔ B. To absorb water and nutrients


C. To perform photosynthesis

D. To make seeds




What is the state of matter with a definite shape and volume?

A. Gas

B. Liquid


✔✔ C. Solid


D. Plasma




What gas do humans need to breathe in order to survive?

A. Carbon dioxide

B. Nitrogen


✔✔ C. Oxygen

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,D. Hydrogen




Which part of the human body controls voluntary movement?

A. Heart

B. Stomach


✔✔ C. Brain


D. Lungs




What causes seasons on Earth?

A. Earth’s distance from the sun

B. Earth’s tilt on its axis


✔✔ C. Earth’s tilt and revolution around the sun


D. Changes in sun’s temperature




Which simple machine is a seesaw an example of?

A. Wheel and axle

B. Pulley


✔✔ C. Lever


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, D. Inclined plane




What is the process by which water changes from liquid to gas?

A. Condensation


✔✔ B. Evaporation


C. Freezing

D. Melting




Which organelle is known as the “powerhouse” of the cell?

A. Nucleus

B. Ribosome


✔✔ C. Mitochondria


D. Chloroplast




What is the force that pulls objects toward Earth?

A. Magnetism


✔✔ B. Gravity


C. Friction


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