Science MCQs

Historically constellations have been crucial for navigation and for creating maps of the night sky.

The Moon's gravitational pull is the primary force that attracts ocean water causing a bulge and leading to tides.

Due to the tilt of Earth's axis when the Northern Hemisphere is tilted toward the Sun (summer) the Southern Hemisphere is tilted away (winter) and vice versa.

Polar night is the period in winter inside the polar circles when the Sun does not rise above the horizon for more than 24 hours.

Weight (W=mg) depends on mass (m) and gravitational acceleration (g). g changes slightly with altitude and latitude but volume does not directly affect weight.

The two pointer stars at the end of the Big Dipper's bowl point directly to Polaris the North Star.

The gravitational field is the region of space surrounding an object where its gravitational force influences other objects.

The strength of a celestial body's gravity depends on its mass. Earth's larger mass creates a stronger gravitational pull.

The Sun's immense gravitational pull provides the centripetal force that keeps Earth in its orbital path.

The Earth's orbit around the Sun is an ellipse though it is very close to being circular.