Which of the following events is not caused by the rotation of earth about its own axis?
Cycle of day and night
Cycle of phases of moon
Sunflower turning to face the sun in the day
The leaves of the rain tree closing every evening
Jupiter .
A celestial object from space that does not burn completely and hits the Earth's surface is
Meteor
Meteroid
Meteorite
Asteroid
Which of the following statements is correct about man-made satellites?
I. They are launched into space using rockets.
II. They revolve around the Earth.
III. They can be used to forecast weather
I only
II only
I and II only
I, II and III
What fraction of earth is always experiencing night time?
One-half
One-tenth
One-fourth
One-fifth
The Earth's closest neighbour in space is
The sun
The moon
Venus
Mars
'X' is composed of ice and dust and is in orbit round the sun. What is X?
A comet
A meteorite
A planet
An asteroid
If the Earth were nearer to the Sun, it might not support life because
It would be too cold.
It would be too hot.
The water would change to gaseous state.
Green plants would not have enought light to make food.
