Biology, 14.09.2019 01:30 evarod

What happens when a substance undergoes a physical change

Answers: 1

Show answers

Answers

Answer from: sydneyharding36191

HERES ALL THE TEST ANSWERS

Explanation:

Physical Properties

1-What happens when a substance undergoes a physical change?

answer-Some physical properties change, but the substance keeps its identity.

2-What is an example of a physical change?

answer-ice forming and then melting back into water

3-When liquid gold becomes a solid, its particles get closer together. Which best describes what happened to the gold?

answer-the rearrangement of particles in a physical change

4-Eugene describes the physical property of a material as “sweet and floral.” What physical property of the material is Eugene most likely observing?

answer-odor

5-Which can occur during physical change?

answer-The particles can arrange in different ways.

6-If there is 8 g of a substance before a physical change, how much will there be afterwards?

answer- 8 grams

7-Which statement about the physical change of liquid water boiling into steam is true?

answer-the heat added represents an energy change

8-Fifteen grams of a liquid plastic are frozen in a physical change that increases the volume. What can be known about the plastic after the change?

answer- it will still weigh 15 grams

9-Which statement best compares and contrasts two physical properties of matter?

answer-Boiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a liquid to a gas and melting point involves a change from a solid to a liquid.

10-Serena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid. What physical property of the material is Serena most likely observing?

answer-solubility

Answer from: Quest

Silicon is cut into tiny pieces for computer chipslead is melted to form pelletsliquid water freezes to form ice

Answer from: Quest

Yes yes yes very good

Another question on Biology

Biology, 22.06.2019 03:00

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)â€”two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.

Answers: 1

Answer

Biology, 22.06.2019 03:30

Which statement best describes a typical difference that could be found between the "analysis" and "conclusion" sections of a lab report? a) only the "conclusion" describes errors that occurred during the experiment, and only the "analysis" section suggests further research.b) only the "analysis" section includes specific data comparisons, and only the "conclusion" section suggests further research.c) only the "analysis" section discusses whether the original hypothesis was supported, and both sections include graphs of data.d) only the "conclusion section discusses whether the original hypothesis was supported, and both sections suggest further research.(the answer is b i just took the test)

Answers: 1

Answer

Biology, 22.06.2019 06:30

Which of the following is a common response to cell signaling?

Answers: 2

Answer

Biology, 22.06.2019 11:30

To store strawberries in sugar syrup, lucy placed them in a jar and covered them with sugar but did not add any water. do you think syrup will be formed? justify. a. no. since water is not added, there cannot be any syrup formation. b. no. the higher concentration of sugar on the outside will cause the water from the sugar to diffuse in the strawberry cells causing them to swell without formation of any syrup. c. yes. the higher concentration of sugar on the outside will cause the water from the strawberry to diffuse out resulting in syrup formation. d. yes. the sugar will melt over time and form the syrup.

Answers: 2

Answer

You know the right answer?

What happens when a substance undergoes a physical change...

Questions