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Sergeu [11.5K]
3 years ago
14

How can you indentify the difference between a chemical and physical change and what are signs that a chemical change has occurr

ed
Biology
2 answers:
Scorpion4ik [409]3 years ago
8 0

Answer:

chemical change changes the identity of a substance, while a physical change can just be observed. Some signs that a chemical change has occurred are, <u><em>temperature change, forming bubbles, color change, new substance forming,</em></u> there are more, but those are just some of which i now

Explanation:

hope this helped!!!<3

photoshop1234 [79]3 years ago
4 0

Answer:

Explanation:

The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. ... After ice melts into liquid water, you can refreeze it into solid ice if the temperature drops. Freezing and melting are physical changes.

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What would be the answers for 33-34?
RUDIKE [14]

Answer:

chromosome

or venue mutations

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2 years ago
A census area based on commuting patterns is called a
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The answer would be combined statistical area. This is made of metropolitan and micropolitan statistical area which would be located in the United States as well as Puerto Rico that demonstrate both economic as well as social linkage.Hope this is the right answer.
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4 years ago
In the picture below, a boy is trying to pull a dog on a leash, but the dog and the boy are moving in the same direction. Which
Illusion [34]

Answer:

The forces are unbalanced, and the dog’s force is greater than the boy's force.

I hope this helped you out! :)

6 0
4 years ago
1. Identify the steps of cell division in a prokaryotic cell.
iris [78.8K]

Answer:

1. Step 1: DNA Replication. Just before the cell divides, its DNA is copied in a process called DNA replication. ...

Step 2: Chromosome Segregation. The two chromosomes segregate, or separate, and move to opposite ends (known as "poles") of the cell. ...

Step 3: Separation.

2. Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase. These phases occur in strict sequential order, and cytokinesis - the process of dividing the cell contents to make two new cells - starts in anaphase or telophase. Stages of mitosis: prophase, metaphase, anaphase, telophase.

4 0
3 years ago
In a lateral-flow pregnancy test, you see a blue band form on the control line and no band form on the test line. This is probab
never [62]

Answer:

negative

Explanation:

Lateral-flow pregnancy test

It is a device use to confirm the prsence or the absence of the target analyte , which can be biomakers or the pathogens .

The very common type of lateral flow rapid test is the pregnancy test .

Lateral - flow technology uses colored nano particles , nitrocellulose membrane and antibodies to produce result of pregnancy .

As the sample is added , it flows along the test device passing via the conjugate pad to the nitrocellulose membrane and then to the absorbent pad.

The blue band on the control;l line and no band on the test line , gives a negative test of pregnancy .

4 0
4 years ago
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