round 2

Oil, natural gas, and coal are examples of …

• Renewable resources

• Biofuels

• Geothermal resources

• Fossil fuels

Which of the following is an example of genetic engineering?

• Inserting a gene into plants that makes them resistant to insects

• Growing a whole plant from a single cell.

• Attaching the root of one type of plant to the stem of another type of plant

• Finding the sequences of bases in plant DNA

What is the main cause of seasons on the Earth?

• The speed that the Earth rotates around the sun

• The distance between the Earth and the sun

• The tilt of the Earth's axis in relation to the sun

• Changes in the amount of energy coming from the sun

The time a computer takes to start has increased dramatically. One possible explanation for this is that the computer is running out of memory. This explanation is scientific …

• Observation

• Hypothesis

• Experiment

• Conclusion

Many diseases have an incubation period. Which of the following best describes what an incubation period is?

• The effect of a disease on babies

• The period during which someone builds up immunity to a disease

• The recovery period after being sick

• The period during which someone has an infection, but is not showing symptoms

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

• Decreased carbon dioxide

• Greater oxygen production

• Colder temperature

• Increased erosion

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

• Neutral

• Acids

• Bases

• Isotopes

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

• It can lead to antibiotic-resistant bacteria

• There will be an antibiotic shortage

• Antibiotics can cause secondary infections

• Antibiotics will get into the water system

A car travels at a constant speed of 40 miles per hour. How far does the car travel in 45 minutes?

• 25 miles

• 30 miles

• 35 miles

• 40 miles

Polio invented by which scientist

• Hovkut

• John-e-Salak

• Maculan

• Funk