7.9

On a space mission, the gravitational environment can negatively affect the bone density of astronauts. Which accommodation will most likely protect the bone health of the crew on a space mission?

• drinking extra fluids

• eating more calories

• wearing protective clothing while inside the space vehicle

• engaging in a daily routine using exercise equipment

Tags

NGSS.HS-LS1-3

What characteristics of the planet, Earth, is essential to the survival of living organisms?

• Earth has abundant available water
  

• Earth has just one orbiting moon.

• Earth orbits the Sun once every 365 days
  

• Earth rotates on its axis once every 24 hours.

Tags

NGSS.MS-ESS2-4

If Earth were much smaller, it would not support life because it would not have enough mass to

• collect needed radiant energy from the Sun.
  

• maintain a gravitational pull on the Moon.

• have sufficient gravity to hold an atmosphere.
  

• rotate on its axis once per day.

Tags

NGSS.MS-PS2-4

How does Carbon Dioxide in Earth's atmosphere allow Earth to support life? 

• Animals need Carbon Dioxide to breathe.

• Carbon Dioxide traps radiation from the sun to warm Earth and is used by plants in photosynthesis.

• Carbon Dioxide is produced by plants so that animals can breathe.

• Carbon Dioxide is needed to make water.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What conditions would you look for if you were looking for life on moons or other planets besides Earth?

• Moderate temperature, ice, and the presence of a gas containing atmosphere.

• Cold temerature, liquid water, and the absence of gas containing atmosphere.

• Moderate temperature, liquid water, and presence of a gas containing atmosphere.

• Hot temperature, liquid water, and the absence of gas containing atmosphere.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-3

Ozone contributes to supporting life on earth by blocking

• radiation

• water vapor.

• helium ions.

• atmospheric heat.

What is the pH level of a neutral solution?

• 7.0

• 7.9

• 8.5

• 6.5

Which of the following pH levels indicates a basic solution?

• 7.9

• 6.0

• 5.5

• 4.0

If a solution has a pH of 7.9, what can be inferred about its acidity or basicity?

• It is acidic

• It is neutral

• It is basic

• It is highly acidic

A solution with a pH of 7.9 is most likely to be found in which of the following environments?

• Stomach acid

• Pure water

• Seawater

• Vinegar