6th Grade Post Test Question Preview (ID: 61435)


VA 6th Grade Science Post-Test. TEACHERS: click here for quick copy question ID numbers.

Which of our Solar System's eight planets is a gas giant, is the largest of the eight, was discovered to have rings, and has a visible feature known as the Great Red Spot?
a) Uranus
b) Jupiter
c) Saturn
d) Neptune

The uneven heating of Earth's atmosphere causes air masses to have different temperatures and densities. Which of the following correctly explains how these differences cause the air masses to move?
a) Colder, denser air masses rise in the atmosphere; warmer, less dense air masses sink in the atmosphere.
b) Warmer, denser air masses rise in the atmosphere; colder, less dense air masses sink in the atmosphere.
c) Warmer, less dense air masses rise in the atmosphere; colder, denser air masses sink in the atmosphere.
d) Colder, less dense air masses rise in the atmosphere; warmer, denser air masses sink in the atmosphere.

Based on the order of plants from the sun, which of the following orbits is the largest?
a) Earth's orbit around the Sun
b) Mercury's orbit around the Sun
c) the Moon's orbit around Earth
d) Jupiter's orbit around the Sun

Wetlands are important because...
a) they reduce erosion by slowing down runoff and storing flood waters.
b) they maintain water quality by filtering sediments, trapping nutrients, and breaking down pollutants.
c) they provide food and shelter for wildlife, fish, and migratory birds.
d) All of these

Shooting stars are actually...
a) comets.
b) moons.
c) meteors.
d) asteroids.

_______ is the only form of heat transfer that can occur across empty space. This means that no solid, liquid, or gas molecules are required for the transfer.
a) Conduction
b) Convection
c) Radiation
d) Reduction

What is the source of energy that drives convection within the Earth's atmosphere?
a) chemical energy in atmospheric molecules
b) energy from the Earth's magnetic field
c) electrical energy from lightning
d) radiation received from the Sun

While at the beach, Charanne notices that there is not much of a difference between the heights of high tide and low tide throughout the day. What else is Charanne likely to notice on this day?
a) a third quarter moon
b) a gibbous tide
c) a spring tide
d) a full moon

Air is a mixture of gaseous elements and compounds. Which of the following elements makes up the largest proportion of air?
a) Water vapor
b) Nitrogen
c) Carbon Dioxide
d) Oxygen

What might be a long-term effect of increased air pollution?
a) The number of cases of asthma might increase.
b) The length of time a cancer patient can live might increase.
c) The largest cities might get smaller.
d) The number of cases of osteoporosis might decrease.

Which of the following is an example of chemical weathering with water?
a) Carbon dioxide combines with water in the atmosphere to form carbonic acid which dissolves some rocks and minerals.
b) When overylying minerals and rocks are removed, the underlying minerals and rocks fracture due to the lack of pressure.
c) Rocks and minerals fracture as they expand when atmospheric temperatures rise then contract when the temperatures drop.
d) All of these are examples of chemical weathering.

As the altitude in the lower layer of the atmosphere increases, the air pressure ________ and the temperature ________.
a) decreases; increases
b) increases; increases
c) increases; decreases
d) decreases; decreases

How does Earth's magnetic field help the Earth to support life?
a) It prevents most of the Sun's energy from reaching the Earth's surface.
b) It shields the Earth from harmful solar radiation.
c) It keeps all the water on Earth's surface liquid.
d) It helps carbon dioxide in Earth's atmosphere escape into space.

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