Science quiz

Humans and chimpanzees share roughly how much DNA?

• 98%

• 20%

• 89%

• 46%

At what temperature are Celsius and Fahrenheit equal?

• -40

• 0

• 100

• -50

Which of the following is an example of genetic engineering?

• Finding the sequences of bases in plant DNA

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

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

• Growing a whole plant from a single cell

What is the main cause of seasons on the Earth?

• 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 speed that the Earth rotates around the sun

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 has an infection, but is not showing symptoms

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

• The recovery period after being sick

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

• Colder temperature

• Increased erosion

• Greater oxygen production

• Decreased carbon dioxide

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

• Acids

• Bases

• Neutral

• 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

All of the following elements are liquids around room temperature except which one?

• Gallium

• Magnesium

• Bromine

• Mercury

In a solution of salt water (a saline solution), salt is the:

• Solute

• Solvent

• Sol

• Colloid