1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Amiraneli [1.4K]
3 years ago
5

4. Susan observed that different kinds and amounts of fossils were present in a cliff behind her house. She wondered why changes

in fossil content occurred from the top to the bottom of the bank. She marked the bank at five positions: 5, 10, 15, 20 and 25 m from the surface. She removed 1 bucket of soil from each of the positions and determined the kind and number of fossils in each sample.
Hypothesis:
Independent Variable:
Dependent Variable:
Constant (at least one):
Control:
Number of groups:
Number of trials per group:
Physics
2 answers:
8090 [49]3 years ago
8 0

Answer:

A scientific experiment is divided into two sample groups: control and the experimental. The control group lacks the key variable to be studied while the experimental group contains the sample to be studied.

The experiment contains three experiments: the variable to be studied (dependent variable), the variable which can be changed and influence the dependent variable (independent variable) and the variable which do not change in the experiment (constant variable).

In the given experiment,  

1. Hypothesis: when the height changes in soil, the content of the fossil in the soil also changes.

2. Independent Variable: the height of the bank from surface

3. Dependent Variable: the number and type of fossil.

4. Constant variable: the amount of soil in the bucket

5. Control: the soil at the surface (0 cm)

6. Number of groups: 5 groups

7. Number of trials per group: should be 3

posledela3 years ago
3 0
5,10,15,20,25,30, that's how much it should have been
You might be interested in
Velocity can best be described by which of the following statements?
pogonyaev

Answer: Velocity can best be described as, the speed in a given direction.

Explanation: To find the answer, we need to know more about the Velocity of a body.

<h3>What is Velocity of a body?</h3>
  • Velocity is the rate of change of displacement.
  • It's a vector quantity and is measured in m/s.
  • It can be positive, negative or zero.
  • A body is said to be in uniform motion, then its velocity remains constant.
  • Change in velocity can be a change in speed.
  • The magnitude of velocity is less than or equal to speed.

Thus, we can conclude that, the option C is best describing velocity.

Learn more about velocity here:

brainly.com/question/28108466

#SPJ4

8 0
1 year ago
Read 2 more answers
What quantity is the rate of change of velocity? Displacement Acceleration Final velocity
MariettaO [177]

Answer:

Acceleration

Explanation:

The quantity of the rate of change of velocity is termed the acceleration of the body.

Acceleration is the rate of change of velocity with time;

  A  = \frac{v - u}{t}  

A is the acceleration

v is the final velocity

u is the initial velocity

t is the time taken

 

7 0
3 years ago
Explain the differences between a physical and chemical change, and give examples of each.
mrs_skeptik [129]
Chemical change:  a reaction/event where the chemicals/elements present before the change are NOT the same molecules present after the change.
For example, combustion reactions such as the burning of wood or rubbing alcohol are examples of chemical change. The reactants before the combustion of rubbing alcohol are CH3O (rubbing alcohol) and O2 oxygen (oxygen). The molecules present after the combustion reaction are CO2 (carbon dioxide) and H2O (water vapor).

Physical Change: a change in structure or state of a substance but, after the change the material is the same material that we started with. One example would be breaking a glass bottle by dropping it. The glass is now in smaller pieces than when we started, but the glass molecules are still glass molecules.

Hope this helped! Leave any questions you still have for me in the comments below!
4 0
3 years ago
Looters break a statue into pieces. how do you expect the weathering of pieces of rock to change
Naya [18.7K]
This definitely has to do with erosion. We can expect that the statue will weather faster because of more surface area.I hope this is what you were looking for
7 0
3 years ago
The kinetic energy of a baseball that with a mass of 0.140kg is 7 J. What is the baseballs velocity?
Nuetrik [128]

Answer:

10 m/s

Explanation:

Kinetic energy= \frac{1}{2}mv² where m is mass and v is velocity.

We have to make v the subject so we should rearrange the equation

K=\frac{1}{2}mv²

v²= \frac{K}{0.5*m} (use algebra)

v²= 7/0.5×0.140

v²=100

v=√100

v=10 m/s

We can confirm this by using the kinetic energy formula.

K=\frac{1}{2}×0.140×10²

K= 7 J

Hence it is proved that velocity is 10 m/s

3 0
1 year ago
Other questions:
  • Physics conversion <br> Convert 300 cm/min^2 into m/s^2 <br> Please give a thorough explanation!
    9·1 answer
  • A deep-space vehicle moves away from the Earth with a speed of 0.870c. An astronaut on the vehicle measures a time interval of 3
    11·1 answer
  • I'll give you branliest- A student uses a counting technique to estimate time. She counts "one one-thousand, two one-thousand, t
    12·2 answers
  • Fomula of displacementtt<br>help
    11·2 answers
  • The batteries in the figure above are connected in​
    8·2 answers
  • Sound wave of a wave length of 0.56 meters if its speed is 280 m/s what is the wave frequency
    5·1 answer
  • When four people with a combined mass of 310 kg sit down in a 2000-kg car, they find that their weight compresses the springs an
    5·1 answer
  • THE ELECTROMAGNET SPECTRUM ONLY HAS WHICH SHAPE OF WAVE?
    5·1 answer
  • GIVING BRAINLIEST TO THE CORRECT ANSWER!!
    15·2 answers
  • a) CALCULATE the acceleration of a 300,000 kg jumbo jet, just before takeoff when the thrust of each of its 4 engines is 36,000
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!