Which statement is true about respiration?

• It converts energy into food.

• It breaks down food to release energy

• It turns carbon dioxide into water.

• It turns water into carbon dioxide.

Tags

NGSS.MS-LS2-3

Which of the following stars is most likely to be blue?

• 
  Star A

• Star B

• Star C

• Star D

Tags

NGSS.MS-PS4-1

Which of the following methods can be used by officials to solve the problem of water pollution?

• Dispose chemical wastes in dustbins.

• Stop droughts and floods.

• Increase the number of factories.

• Use scientific solutions.

Tags

NGSS.MS-ESS3-3

NGSS.MS-ETS1-1

Which statement is true about the Milky Way?

• It is a big planet.

• It contains the universe.

• It has an irregular shape.

• It has several billion stars.

Which of the following statements is correct about the gases which participate in photosynthesis?

• Carbon dioxide is used up, and oxygen is produced.

• Oxygen is used up, and carbon dioxide is produced.

• Carbon dioxide is used up, and hydrogen is produced.

• Hydrogen is used up, and carbon dioxide is produced.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following contains the Milky Way galaxy?

• The local group

• The moon

• The solar system

• The sun

Tags

NGSS.MS-ESS1-2

Why is this diagram incorrect?

• Water is not used up during this process.

• Glucose is not used during this process.

• The arrow for oxygen should point in the opposite direction.

• The arrow for carbon dioxide should point in the opposite direction.

In which part of the sun do gases heat up and rise and then cool down and sink?

• Convective zone

• Inner core

• Photosphere

• Radiative zone

Which of the following is an appropriate unit to measure large distances across the solar system?

• Astronomical unit

• Meter

• Square mile

• Year

Which of the following physical properties of stars are plotted on an HR diagram?

• Absolute brightness and size

• Apparent magnitude and mass

• Apparent magnitude and luminosity

• Absolute brightness and temperature