Class 4 Ls. 11 Our Universe

The sun is a _________

• planet

• satellite

• star

• huge rock

Which of the following is not a planet?

• Venus

• moon

• Neptune

• Mars

The innermost layer of the Earth is known as the ________.

• axis

• core

• crust

• mantle

Which of the following is no longer considered to be a planet?

• Mars

• Mercury

• Pluto

• Earth

Which of the following is used to gather information about heavenly bodies?

• Telescope

• Microscope

• Windvane

• Thermometer

The moon is a ____________ satellite.

• artificial

• natural

___________ was the first man-made satellite to be launched into space by Russia in October 1957.

• Sputnik 1

• Aryabhatta

The surface of the moon is ______________

• uneven

• has mountains

• has deep holes called craters

• All of the above

A scientist who studies about stars, planets and other heavenly bodies is called an __________.

• biologist

• astronomer.

• geologist

____________ is the full form of IAU

• Internal Astronomical Union

• Indian Astronomical Unit

• International Astronomical Union