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All radioactivity is man-made. Is this statement…
Electrons are smaller than atoms. Is this statement…
Lasers work by focusing sound waves. Is this statement…
The continents on which we live have been moving their location for millions of years and will continue to move in the future. Is this statement…
Which one of the following types of solar radiation does sunscreen protect the skin from?
Does nanotechnology deal with things that are extremely…
Which gas makes up most of the Earth’s atmosphere?
What is the main function of red blood cells?
Fight disease in the body
Carry oxygen to all parts of the body
Help the blood to clot
Which of these is a major concern about the overuse of antibiotics?
It can lead to antibiotic-resistant bacteria
Antibiotics are very expensive
People will become addicted to antibiotics
Which is an example of a chemical reaction?
Which is the better way to determine whether a new drug is effective in treating a disease? If a scientist has a group of 1,000 volunteers with the disease to study, should she…
Give the drug to all of them and see how many get better
Give the drug to half of them but not to the other half, and compare how many in each group get better
What gas do scientists believe causes temperatures in the atmosphere to rise?
Which natural resource is extracted in a process known as “fracking”?