MCAS MCAS Science and Technology/Engineering 2

Question 1

Which organelle is known as the powerhouse of the cell?

Accepted Answer

Mitochondria

Answer

Nucleus

Answer

Ribosome

Answer

Vacuole

Question 2

What is the chemical symbol for water?

Accepted Answer

H₂O

Answer

HO

Answer

CO₂

Answer

NaCl

Question 3

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

Accepted Answer

Test and evaluate

Answer

Define the problem

Answer

Research and brainstorm

Answer

Build another prototype immediately

Question 4

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

Accepted Answer

Chemical energy

Answer

Kinetic energy

Answer

Thermal energy

Answer

Nuclear energy

Question 5

Which planet is closest to the Sun?

Accepted Answer

Mercury

Answer

Venus

Answer

Earth

Answer

Mars

Question 6

What is the difference between a physical change and a chemical change?

Accepted Answer

Chemical changes alter the substance's identity; physical changes do not

Answer

Physical changes alter the substance's identity; chemical changes do not

Answer

They are the same thing

Answer

Only chemical changes are reversible