Answer the following question given this paragraph: Atoms form covalent bonds by sharing valence electrons. The valence electrons are located in atomic orbitals. However, when a bond forms, the structure of the atomic orbitals changes. In this lesson, we will see how the atomic orbitals interact to share valence electrons and form different types of covalent bonds. Q: What do atoms form by sharing valence electrons? Choices: - phenotype bonds - neutron bonds - ionic bonds - covalent bonds A:
covalent bonds
Answer the following question given this paragraph: Sulfate minerals contain sulfur atoms bonded to oxygen atoms. Like halides, they can form in places where salt water evaporates. Many minerals belong in the sulfate group, but there are only a few common sulfate minerals. Gypsum is a common sulfate mineral that contains calcium, sulfate, and water. Gypsum is found in various forms. For example, it can be pink and look like it has flower petals. However, it can also grow into very large white crystals. Gypsum crystals that are 11 meters long have been found. That is about as long as a school bus! Gypsum also forms at the Mammoth Hot Springs in Yellowstone National Park, shown in Figure below . Q: What two types of atoms bond to form sulfate minerals? Choices: - oxygen and carbon - oxygen and calcium - carbon and sulfur - oxygen and sulfur A:
oxygen and sulfur
Q: Answer the following question given this paragraph: Q: What kind of reproduction requires the fusion of male and female gametes? Choices: - autonomous reproduction - asexual reproduction - subject reproduction - sexual reproduction A:
A: sexual reproduction
Question: Answer the following question given this paragraph: Cells are the tiny building blocks of living things. They couldn't be discovered until the microscope was invented. The discovery of cells led to the cell theory. This is one of the most important theories in life science. Q: What are all living things made of? Choices: - water - proteins - muscles - cells A:
Answer: cells
*Question*
Answer the following question given this paragraph: Mirrors and lenses are used in optical instruments to reflect and refract light. Optical instruments include microscopes, telescopes, cameras, and lasers. Q: Mirrors and lenses are used in optical instruments to reflect and refract what? Choices: - gravity - mass - electricity - light A:
**Answer**
light
*Question*
Answer the following question given this paragraph: Most cells are so small that you cannot see them without the help of a microscope . It was not until 1665 that English scientist Robert Hooke invented a basic light microscope and observed cells for the first time, by looking at a piece of cork. You may use light microscopes in the classroom. You can use a light microscope to see cells ( Figure below ). But many structures in the cell are too small to see with a light microscope. So, what do you do if you want to see the tiny structures inside of cells?. Q: What would you need to see most cells? Choices: - ultraviolet - infrared - mirror - microscope A:
**Answer**
microscope