MCAS MCAS Science and Technology/Engineering 2

Question 1

Which organelle is known as the powerhouse of the cell?

Accepted Answer

Mitochondria

Answer

Mitochondria produce ATP through cellular respiration, earning the title 'powerhouse of the cell.'

Question 2

What is the chemical symbol for water?

Accepted Answer

H₂O

Answer

Water's chemical formula is H₂O, meaning two hydrogen atoms bonded to one oxygen atom.

Question 3

In the engineering design process, what happens after a prototype is built?

Accepted Answer

Test and evaluate

Answer

After building a prototype, the next step is to test and evaluate it to determine if it meets the design criteria.

Question 4

What type of energy is stored in food and released during digestion?

Accepted Answer

Chemical energy

Answer

Food stores chemical energy in molecular bonds, which is released and converted to usable energy during digestion and metabolism.

Question 5

Which planet is closest to the Sun?

Accepted Answer

Mercury

Answer

Mercury is the closest planet to the Sun in our solar system, orbiting at an average distance of about 57.9 million km.

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