2024 3RD NW REVIEW Exam

1. Ms. Thompson’s 6th grade science class wants to design an investigation that demonstrates how energy from the sun transfers heat to air, land and water. Which investigation BEST demonstrates the transfer of heat?

• 1. Create a “puddle”. 2. Each puddle is an ice cream bucket filled ½ inch with water. 3. Measure the depth of the water in each bucket. 4. Record data and make observations.
• 1. Place a thermometer on different sheets of paper under a light source at the same distance. 2. Note the start temperature and record temperature every 30 seconds for 20 minutes. 3. Record observations and data.
• 1. Take a piece of chalk and talk with students about its composition (it's made of calcium carbonate). 2. Place crushed chalk into a beaker and add vinegar. 3. By pouring on the vinegar, the chalk releases CO2.
• 1. Fill the beaker up to 200 mL mark with water and the other beaker to the 200 mL with sand or soil. 2. Place a thermometer in each breaker 1 cm below the surface. 3. Place beaker 15 cm below the bulb of the lamp (do not turn on lamp yet). 4. Start stopwatch and turn on the light simultaneously. 5. Record temperature of each beaker every 10 minutes.

2. Which are the three MAIN gases that make up our atmosphere?

• nitrogen
• argon
• oxygen
• hydrogen
• carbon dioxide

3. Which layer of the atmosphere is most likely to produce precipitation?

• layer A
• layer B
• layer C
• layer D

4. Professor Bob had a lit candle sitting in a pie pan. The candle was surrounded by water. He placed a flask over the candle. The water began to fill the flask until the candle was extinguished. Why did this happen?

• The candle created more smoke in the flask, causing the water to rise into the flask.
• The candle created more water molecules in the flask, causing the water to rise into the flask.
• The candle created less pollution in the flask, causing the water to rise into the flask.
• The candle created less air pressure in the flask, causing the water to rise into the flask.

5. How are the mesosphere and troposphere layers of the atmosphere similar?

• Both atmospheric layers contain the most gases.
• Both atmospheric layers contain the ozone layer.
• Both atmospheric layers have very few molecules and low pressure.
• Both atmospheric layers decrease in temperature as altitude increases.

6. We live in the _________________, the lowest layer of the atmosphere.

• mesosphere
• troposphere
• ionsophere
• exosphere

7. Scientists have observed that high levels of heat are being trapped in the lower atmosphere. Based on the data, why might this be happening?

• By burning fossil fuels, less water vapor is entering the atmosphere.
• By burning fossil fuels, we are placing more greenhouse gases into the atmosphere.
• By burning fossil fuels, we are removing the ozone from the atmosphere.
• By burning fossil fuels, less nitrogen is entering the atmosphere.

8. Why is the sky blue?

• Infrared light changes the atmosphere.
• Electromagnetic waves transfer energy to the atmosphere.
• The atmosphere scatters visible light.
• The ocean reflects the visible light.

9. The trapping of the Sun's heat in our troposphere is called the

• Coriolis Effect
• global effect
• air mass effect
• greenhouse effect

10. This part of the ocean floor has an extreme slope down to the bottom of the ocean. It is located at point "A".

• continental shelf
• continental slope
• continental rise
• continental plain