Answer the following question given this paragraph: An ecosystem includes the living organisms (all the populations) in an area and the non-living aspects of the environment ( Figure below ). An ecosystem is made of the biotic and abiotic factors in an area. Q: What includes the living organisms in an area and the non-living aspects of the environment? Choices: - outpost - habitat - degradation - ecosystem A:
ecosystem
(Question)
Answer the following question given this paragraph: All atoms of the same element have the same number of protons, but some may have different numbers of neutrons. For example, all carbon atoms have six protons, and most have six neutrons as well. But some carbon atoms have seven or eight neutrons instead of the usual six. Atoms of the same element that differ in their numbers of neutrons are called isotopes . Many isotopes occur naturally. Usually one or two isotopes of an element are the most stable and common. Different isotopes of an element generally have the same physical and chemical properties. That's because they have the same numbers of protons and electrons. For a video explanation of isotopes, go to this URL:. Q: What is the name of an element with a different number of neutrons? Choices: - mineral - reaction - solution - isotope A:
(Answer)
isotope
Ques: Answer the following question given this paragraph: The three types of muscles in the body include skeletal muscle, smooth muscle, and cardiac muscle. Q: Smooth, cardiac, and skeletal are all types of what? Choices: - hormones - bone - teeth - muscle A:
Ans: muscle
(Q).
Answer the following question given this paragraph: Earth's crust contains a lot of oxygen. The oxygen can combine with other elements to create oxide minerals. Oxides contain one or two metal elements combined with oxygen. Oxides are different from silicates, because they do not contain silicon. Many important metals are found as oxides. For example, hematite and magnetite are both oxides that contain iron. Hematite (Fe 2 O 3 ) has a ratio of two iron atoms to three oxygen atoms. Magnetite (Fe 3 O 4 ) has a ratio of three iron atoms to four oxygen atoms. Notice that the word "magnetite" contains the word "magnet. " Magnetite ( Figure below ) is a magnetic mineral. Q: What layer of earth contains abundant oxygen, which can combine with other elements to create oxide minerals? Choices: - the core - the surface - the tectonic plates - the crust A:
(A).
the crust
Ques:Answer the following question given this paragraph: In order to live on land and in water, frogs have three eyelid membranes: one is see-through to protect the eyes underwater, and the two other ones let them see on land. Frogs also have a tympanum , which acts like a simple ear. They are found on each side of the head. In some species, the tympanum is covered by skin. Q: How many eyelid membranes do frogs have? Choices: - two - four - one - three A:

Ans:three
Answer the following question given this paragraph: The majority of mollusks and annelids live in the water or inside hosts. Arthropods are invertebrates that include insects. The majority of arthropods live on land. Q: Where do the majority of arthropods live? Choices: - in hives - in water - in air - on land A:
on land