Question

question 22 (1 point)
match the stroke of a combustion engine with its description:

column a\tcolumn b

1. ___ intake stroke\ta. the spark ignites the mixture, causing an explosion
2. ___ compression stroke\tb. the piston expels exhaust gases from the cylinder
3. ___ power stroke\tc. the piston compresses the fuel - air mixture
4. ___ exhaust stroke\td. the piston moves down, drawing in fuel and air

question 23 (1 point)
what is the main topic discussed in the blue spheres video?

a the behavior of greenhouse gases in the atmosphere
b the effect of deforestation on global warming
c the process of photosynthesis in plants
d the impact of air pollution on the ozone layer

question 24 (1 point)
from the brainstorming activity, which example would demonstrate intense combustion with high exhaust production?

a a campfire
b a candle burning
c a fireworks display
d a gas stove

Explanation:

Question 22:

1. Intake Stroke: The piston moves downward to draw in fuel and air.
2. Compression Stroke: The piston compresses the fuel-air mixture.
3. Power Stroke: The spark plug ignites the compressed mixture, creating an explosion that drives the piston.
4. Exhaust Stroke: The piston pushes exhaust gases out of the cylinder.

Question 23:

The "Blue Spheres" video focuses on how greenhouse gases (represented by blue spheres) act in the atmosphere to trap heat.

Question 24:

A fireworks display involves rapid, intense combustion of chemical propellants and pyrotechnics, producing large amounts of exhaust gases, smoke, and debris, which is more intense than the other options.

Answer:

Question 22:

1. Intake Stroke - d. The piston moves down, drawing in fuel and air
2. Compression Stroke - c. The piston compresses the fuel-air mixture
3. Power Stroke - a. The spark ignites the mixture, causing an explosion
4. Exhaust Stroke - b. The piston expels exhaust gases from the cylinder

Question 23:

a. The behavior of greenhouse gases in the atmosphere

Question 24:

c. A fireworks display