Science Final

Question 1

How do populations survive when the environment changes?

Answer 1

Populations survive when the environment changes by adapting.

Question 2

What are different ways in which environments can change?

Answer 2

Environments can change by weather, temperature, natural disasters, and human interference.

Question 3

How does adaptation affect populations over time?

Answer 3

Adaptations affect populations over time by slowly changing them because of the organisms new needs.

Question 4

What is evolution?

Answer 4

Evolution is a theory that the various types of animals and plants have their origin in other preexisting types and that the distinguishable differences are due to modifications in successive generations.

Question 5

How does common ancestry provide evidence for evolution?

Answer 5

Common ancestry provides evidence for evolution because it is saying that we all came from the same organism and the diversity that we see in other organisms must mean that some change took place that changed us but not other organisms and vise versa.

Question 6

How does embryological development contribute to the understanding of evolution?

Answer 6

Embryological development contributes to the understanding of evolution because most animals develop the same way in their early embryological development stages and change after that period supporting that we all looked the same but something changed us to later diverse.

Question 7

What evidence of common ancestry and diversity relates to human evolution?

Answer 7

Evidence of common ancestry and diversity relate to human evolution because we are very different than other animals but still have common attributes.

Question 8

What is genetic variation and how does it help a population to survive?

Answer 8

Genetic diversity serves as a way for populations to adapt to changing environments. With more variation, it is more likely that some individuals in a population will possess variations of traits that are suited for the environment. Those individuals are more likely to survive to produce offspring bearing that trait.

Question 9

How do populations benefit from individual adaptations?

Answer 9

Organisms with beneficial adaptations are more likely to survive and reproduce. Their offspring will have some of the parent organism’s beneficial adaptations. Over time, the number of organisms in a population with the beneficial adaptation will increase.

Question 10

How do organisms survive in a changing environment?

Answer 10

Organisms adapt to the environment or they die.

Question 11

How do fossils form?

Answer 11

Through some heat and pressure.

Question 12

What kind of information do fossils provide about life on Earth?

Answer 12

They show conditions that the world was in and what adaptations were useful.

Question 13

How does fossil evidence support the theory of evolution?

Answer 13

It shows the gradual change of an organism over a period of time.

Question 14

What is a fossil?

Answer 14

A fossil is the remains or waste of an organism.

Question 15

How do fossils show how organisms have evolved through time?

Answer 15

They show the little changes in their body or depending on the place their found, their behavior.

Question 16

How do fossils provide evidence of environmental changes that occurred in the past?

Answer 16

Fossils show where the organism might have migrated and it shows what the organism ate or behaved like.

Question 17

What are the different types of divisions of geologic time?

Answer 17

Eon, Era and Period.

Question 18

How do the ages of the oldest fossils compare to the age of Earth?

Answer 18

Eras are divided into periods, which are then divided into epochs and fossils help separate time periods. The oldest fossils known are about 3.5 billion years old. Earth is about 4.6 billion years old.

Question 19

How do different organisms in a community obtain energy from their environment?

Answer 19

Some make their through photosynthesis, some eat plants while others eat other organisms.

Question 20

Why are relationships between organisms in a community important?

Answer 20

It keeps the populations in balance because if one were to disappear it would make one be the dominant relation.

Question 21

How does energy move through an ecosystem?

Answer 21

Plants make their own energy and when animals eat them They give half of that energy to the animal then when another animal eats the animal that ate the plant it gets half of that energy too.

Question 22

How do organisms interact with the living and nonliving environments to obtain matter and energy?

Answer 22

They form different relationships with them.

Question 23

How do populations interact within communities and ecosystems?

Answer 23

In ecology, a community is the biotic component of an ecosystem. It consists of populations of different species that live in the same area and interact with one another. Like abiotic factors, such as climate or water depth, species interactions in communities are important biotic factors in natural selection.

Question 24

How do various factors in a habitat limit population size?

Answer 24

In the natural world, limiting factors like the availability of food, water, shelter, and space can change animal and plant populations. Other limiting factors, like competition for resources, predation, and disease can also impact populations.

Question 25

What are molecules made of and what are their properties?

Answer 25

A molecule is the smallest particle of a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.

Question 26

How are compounds different from the elements from which they are formed?

Answer 26

A compound is a substance formed when two or more elements are chemically joined. Water, salt, and sugar are examples of compounds. When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of.

Question 27

How can you predict how atoms will combine to form a molecule?

Answer 27

How can you predict how atoms will combine to form a molecule? Answer: Ionic compounds can break up, or “dissociate” into ions when placed in water. This forms a solution. Common ions are the hydrogen ion and the hydroxide ion.

Question 28

How can ionic compounds break into pieces?

Answer 28

These compounds are brittle and break into small pieces easily. Electrovalent compounds usually dissolve in water and are insoluble in solvents like oil, petrol, kerosene, etc. Ionic compounds do not conduct electricity in a solid state but they do conduct electricity in the molten state.

Question 29

What is a chemical reaction?

Answer 29

A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

Question 30

What are the signs that a chemical reaction has occurred?

Answer 30

Yes; new substances formed, as evidenced by the color changes and bubbles. Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.

Question 31

What is the Law of Conservation of Mass?

Answer 31

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Question 32

How do scientists represent chemical reactions?

Answer 32

Chemical Reactions. Because atoms are neither created nor destroyed in a chemical reaction, the total mass of products in a reaction must be the same as the total mass of the reactants. Example: The reaction between hydrogen and oxygen to form water is represented by the following equation.

Question 33

How are chemical equations written to show that mass is conserved?

Answer 33

Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.