Answer the following question given this paragraph: The angle at which light bends when it enters a different medium depends on its change in speed. The greater the change in speed, the greater the angle of refraction is. For example, light refracts more when it passes from air to diamond than it does when it passes from air to water. That's because the speed of light is slower in diamond than it is in water. Q: The angle at which light bends when it enters a different medium is known as what? Choices: - bounce - frequency - resonance - refraction A:
refraction
(Question)
Answer the following question given this paragraph: Electrons at the outermost energy level of an atom are called valence electrons. They determine many of the properties of an element. That's because these electrons are involved in chemical reactions with other atoms. Atoms may share or transfer valence electrons. Shared electrons bind atoms together to form chemical compounds. Q: What are electrons at the outermost energy level of an atom are called? Choices: - core electrons - ions - shell electrons - valence electrons A:
(Answer)
valence electrons
Ques: Answer the following question given this paragraph: Q: What do you call the membrane-bounded droplets that have some properties of cells? Choices: - rods - membranes. - sporozoans - protocells A:
Ans: protocells
(Q).
Answer the following question given this paragraph: Did you ever see workers sandblasting a building to clean it? Sand is blown onto the surface to scour away dirt and debris. Wind-blown sand has the same effect. It scours and polishes rocks and other surfaces. Wind-blown sand may carve rocks into interesting shapes ( Figure below ). This form of erosion is called abrasion. It occurs any time rough sediments are blown or dragged over surfaces. Can you think of other ways abrasion might occur?. Q: Sandblasting a surface exemplifies what form of erosion? Choices: - wind - glacial - water - abrasion A:
(A).
abrasion
Ques:Answer the following question given this paragraph: Overview of Transcription. Transcription uses the sequence of bases in a strand of DNA to make a complementary strand of mRNA. Triplets are groups of three successive nucleotide bases in DNA. Codons are complementary groups of bases in mRNA. Q: What is the term for groups of three successive nucleotide bases in dna? Choices: - triads - tertiary bases - triple play - triplets A:

Ans:triplets
Ques:Answer the following question given this paragraph: Scientists have built machines called particle accelerators . These amazing tools smash particles that are smaller than atoms into each other head-on. This creates new particles. Scientists use particle accelerators to learn about nuclear fusion in stars. They can also learn about how atoms came together in the first few minutes of the Universe. Two well-known accelerators are SLAC, in California, and CERN, in Switzerland ( Figure below ). Q: What machines have scientist built to smash particles that are smaller than atoms into each other head-on? Choices: - energy accelerators - nitrogen accelerators - Atom Accelerators - particle accelerators A:

Ans:
particle accelerators