Science Potpourri 1

When glaciers pass over rocks, they scratch them and leave parallel marks called _.

• Striations

• Stripeys

Tags

NGSS.MS-ESS2-2

Glacial striations on rocks indicate that

• The rock was scraped by glaciers moving over it.

• The rock contains gneiss, which is a cold mineral.

Tags

NGSS.MS-ESS2-2

How were the great lakes, such as Lake Superior, formed?

• Glacier movement and melting during the ice ages.

• The U.S.A. built a dam on Lake Huron and it pooled the water into the other Great Lakes.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

How might scientists gather data to learn more about pollution in a great lake?

• Take samples of water at the same places on the lake, at the same depth every month

• Find the pH of a glass of city tap water at each capital city in the USA and count Washington D.C. as a state

Tags

NGSS.MS-LS2-1

The average air pressure at sea level is 1013 millibars. A sharp decrease in air pressure indicates stormy weather. What would an increase in air pressure mean?

• Calm, sunny weather

• Approaching severe weather

Tags

NGSS.MS-ESS2-5

Decreased air pressure warns us of stormy weather. Increased air pressure indicates calm or fair weather. Which cloud type would be seen with high pressure?

• Cirrus or cumulus

• Stratus

• Cumulonimbus

Tags

NGSS.MS-ESS2-5

Scientists on a boat collect lake sediments and take them to the laboratory. Using chemistry, they find that the sediment contains arsenic, lead, and mercury. Their research project was:

• To explore the effects of pollution on the lake ecosystem over time

• To determine the types of pollutants found in the lake

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Power plants burn coal to produce electricity and pollute the air with mercury. If less coal were burned, how would the amount of mercury pollution change?

• Less mercury pollution

• More mercury pollution

Power plants burn coal to produce electricity and pollute the air with mercury. If less coal were burned, how do scientists believe a nearby lake would be affected?

• Its condition would be improved with less mercury

• Its condition would be improved with more mercury

Tags

NGSS.HS-LS2-6

NGSS.HS-LS2-7

Which is a physical change?

• Burning

• Melting

• Rotting