Unit 1 Earth Science

An independent variable is what the scientist

• keeps the same

• observes

• measures

• changes

A dependent variable is what the scientist

• keeps the same

• observes

• tests

• changes

Identify the Independent variable from the following problem:

 You water three sunflower plants with salt water. Each plant receives a different concentration of salt solutions. A fourth plant receives regular water. After a two-week period, the height is measured.

• The type of water (salt water or regular water)
• The concentration of salt solutions
• The height of the sunflower plants
• The two-week period

An independent variable is what the scientist

• keeps the same

• observes

• measures

• changes

Identify the Dependent variable: One tank of goldfish is fed the normal amount of food once a day, a second tank is fed twice a day, and a third tank four times a day during a six week study. The fish’s body fat is recorded daily.

• Amount of food
• Number of times the fish are fed
• Type of fish
• Fish's body fat

How does the sun give energy to the Earth? 

• red shift

• Through nuclear fusion
• By creating wind energy
• By radioactive decay

Tags

NGSS.HS-ESS1-1

An element is determined by the amount of 

• Protons
• Neutrons
• Electrons
• Isotopes

What are the three things that H-R Diagrams tell us about different stars? 

• Temperature, brightness (luminosity), and color

• Color, Distance, and Size
• Temperature, Distance, and Luminosity
• Color, Luminosity, and Size

Tags

NGSS.HS-ESS1-3

How many Hydrogens does it take to fuse one helium? 

• 1
• 2
• 4
• 8

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

In the fusing of hydrogen into helium. What happens to 2 of the protons? 

• They are converted into neutrons
• They are destroyed
• They are converted into electrons
• They remain as protons