The large dark patches on the Moon's surface are known as___________
(A) Dark matter
(B) Maria, or seas, even though there is no water on the Moon
(C) Maria, or seas, because they are filled with water
(D) Moon spots
What causes the Moon's phases
(A) The Sun lights up only one half of the Moon and as the Moon orbits the Earth we can sometimes see the unlit side of the Moon.
(B) The Sun lights up only one half of the Moon and as the Sun orbits the Earth we can sometimes see the unlit side of the Moon.
(C) The Earth's shadow falls on the Moon, blocking the sunlight.
(D) The Moon's shadow falls on the Earth, blocking the sunlight.
What are the names of the two stars in the Big Dipper used to locate Polaris
(A) The North Seekers
(B) The Pointer Stars
(C) The Pointer Sisters
(D) None of these
The Big Dipper is part of which constellation
(A) Ursa Major
(B) Ursa Minor
(C) The Great Bear
(D) A & C Both
Rate of evaporation of petrol is greater than that of water at room temperature because:
(A) petrol molecules do not have any hydrogen bond
(B) petrol is an organic compound
(C) water molecules have small size
(D) petrol molecules have greater size
Honey contain glucose and fructose along with some other ingredients, it has greater viscosity due to____________
(A) hydrogen bonding
(B) irregular shape of the molecules
(C) irregular shape of the molecules and strong inter-molecular forces
(D) greater molecular size
All of the following substances are crystalline except_____________
(A) Ice
(B) Diamond
(C) Sucrose
(D) Plastic
Some substances are good conductor of electricity in both the solid and liquid states These substances are generally______________
(A) ionic substances
(B) metallic substances
(C) molecular solids
(D) covalent network solids