Oil, natural gas and coal are examples of …

What is the main cause of seasons on the Earth?

• Changes in the amount of energy coming from the sun
• The tilt of the Earth's axis in relation to the sun
• The distance between the Earth and the sun
• The speed that the Earth rotates around the sun

When large areas of forest are removed so land can be converted for other uses, such as farming, which of the following occurs?

• Decreased carbon dioxide
• Increased erosion
• Greater oxygen production
• Colder temperature

An antacid relieves an overly acidic stomach because the main components of antacids are...

• Neutral
• Bases
• Isotopes
• Acids

Which of these is a major concern about the overuse of antibiotics

• It can lead to antibiotic-resistant bacteria
• Antibiotics will get into the water system
• There will be an antibiotic shortage
• Antibiotics can cause secondary infections

Chlorophyll is a naturally occurring chelate compound in which central metal is

• copper
• magnesium
• iron
• calcium

Which of the following is used in pencils?

• Graphite
• Silicon
• Charcoal
• Phosphorous

Chemical formula for water is

• NaAlO2
• H2O
• Al2O3
• CaSiO3

The outward force, away from the center, felt by an object in circular motion is called_____

• Centripetal force
• Circular Force
• Centrifugal Force
• Elastic Force

The definition of "panel on a spacecraft used to generate electrical power" best fits this science term?

• Battery
• Solar Array
• Lunar
• Module Byte