Which two of these are chemical reactions? Tick two boxes.



You
dissolve a spoonful of sugar in water.
 


Bread goes
brown in the toaster.
 


You take an
ice lolly out of the freezer and it strats to melt.
 


Frost forms on
the grass an a cold night.
 


You strike a
match to light a Bunsen burner.
 

Answers

Answer 1
Answer: Strike a match and a spoon of sugar
Answer 2
Answer: The second one and the fifth one.

Bread goes brown in toaster and lighting a burner.

Reason: - Both the actions involve combustion; which is a chemical change.

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You overhear someone say that two objects with the same mass have the same gravitational potential energy Do you agree? Explain.

Answers

The gravitational potential energy not only depends on the mass of the substance but also on the height it positioned. Hence, two objects with same mass does not have same potential energy if they are not in same height.

What is gravitational potential energy?

Gravitational potential energy of an object is the energy generated by virtue of  its position in gravitational field.  Gravitational force is exerted by one object by which it attracts other objects into its centre of mass.

The gravitational force is dependant upon the mass of the object as well to the distance between the objects. Similarly the potential energy p is proportional to the mass m, gravity g and the height from the surface h.

Hence p = mgh.

As per this relation potential energy is not only affected by the mass but also the height at which the objects are located.

If an object is placed at a height higher than other object having same mass then it stores greater potential energy. Hence, we can't agree with the statement .

To find more on potential energy refer here:

brainly.com/question/24284560

#SPJ2

Answer:

the above screenshot has the answers

What are Earth's four interconnected global systems?

Answers

Answer:

Answer D

Explanation:

The Earth's system can be placed into four sub- groupings- : atmosphere, biosphere, lithosphere, and hydrosphere.

Answer:

Ocean, Land, Atmosphere, Life

Explanation:

What are small round structures in the cell that breaks down large food particles into smaller ones

Answers

Lysosomes break down large food particles into smaller ones in a cell.
the small particles are known as protiens

In a strike-slip fault, the rocks on either side of the fault slip past each other sideways. Please select the best answer from the choices provided T F

Answers

its true i just toke it

In a strike-slip fault, the rocks on either side of the fault slip past each other sideways. The answer is True.

Steps of scientific inquiry?

Answers

1. Figure out a problem
2. Research
3. Hypothesis  
4. Experiment
5. Analyze results 
6. Conclusion 
7. Communicate your results

Hope This Helps. :D 
Ask a question related with your topic
Research data of the topic
Construct logical Hypothesis 
Test your Hypothesis to prove if your hypothesis was correct
Analyze your data and draw a Conclusion
6 Communicate your results to the science community

How Fast Do Different Parts Of The EM Spectrum Travel In A Vacuum?

Answers

All electromagnetic waves travel at light speed, so they all travel the same speed.