Science and Technology -Important Points
1-Electrons are smaller than atoms.
2-Lasers work by focusing sound waves. Is this statement true or false ?
Ans- False.
3-All radioactivity is man-made. Is this statement true or false ?
Ans-False
4-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 true or false ?
Ans- True.
5-Which types of solar radiation does sunscreen protect the skin from ?
Ans- Ultraviolet
6-Which gas makes up most of the Earth’s atmosphere ?
Ans- Nitrogen.
7-Which is a major concern about the overuse of antibiotics ?
Ans-It can lead to antibiotic-resistant bacteria.
8-Sugar dissolving is an example of a chemical reaction.
9-What gas do most scientists believe causes temperatures in the atmosphere to rise ?
Ans- Carbon dioxide.
10-Which natural resource is extracted in a process known as “fracking” ?
Ans- Natural gas