2nd Quarter Exam Review

5th Grade - 2nd Quarter Exam Review

Physical Science

Physical Changes

• changes to matter that can be reversed

• the change does not create a new substance (nothing new is made)

• the matter you start with is still there

• phase changes (changing states of matter) are physical changes

• matter changing from solid to liquid to gas

Examples of Physical Changes

• freezing

• melting

• condensation

• evaporation

• cutting

• breaking

• crushing

Multiple Choice

what is a physical change

• its when a transformation doesn't change the nature of the molecules in matter

• its when a transformation change the nature of the molecules in matter

• its when a transformation change the nature of the molecules in substance

Multiple Choice

which of these example is a physical change?

Multiple Choice

Glass bottle that is shattered

• Chemical Change
• Physical Change

Multiple Choice

What kind of change occurs if matter changes in amount, size, or shape?

• substance change

• chemical change

• physical change

• elemental change

Multiple Choice

When matter undergoes a physical change, mass is...

• never conserved

• always conserved

• sometimes conserved

Chemical Changes

• new matter is formed

Evidence that chemical changes have occured

• burning

• baking

• rusting

• color change

• new smell

• bubbling or foaming

• a gas is released

Evidence that chemical changes have occured

• temperature change

• light or heat

• precipitate forming when two chemicals are mixed ( a solid formed floating in a liquid)

• rotting or ripening

• decomposing (breaking down materials)

Multiple Choice

Which of the following is observed here?

• A physical change because you have the same types of atoms

• A physical change because you are just breaking the atoms up

• A chemical change because you are forming a new substance

• A chemical change because atoms are involved

Multiple Choice

Wood burned in a fireplace

• Chemical Change
• Physical Change

Multiple Choice

Which of these is a result of a chemical change?

• A mixture
• A solution
• A new substance
• Melting or freezing

Multiple Choice

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Law of Conservation of Matter

• matter cannot be created or destroyed it only changes

  mass of matter after a physical change stays the same after the change

• it can change form or state, but it will keep its mass/weight

Law of Conservation of mass/matter

Conservation of Mass example

How do I know matter was conserved after a physical or chemical change?

• if a chemical change creates a new substance and you weigh it, you would see that it has the same weight as the original materials before they were combined

Law of conservation of mass/matter

the weight/mass will before the change will be the same after the change as long as the matter is contained and does not escape

Multiple Choice

Does matter ever go away?

• Yes

• No

Open Ended

Explain your answer to the previous question.

Multiple Choice

The change of matter between solid, liquid and gas is called a

• chemical change

• morphing

• a phase change

• magic

Fill in the Blanks

Multiple Choice

When 5 grams of sugar and 10 grams of water are mixed, the solution weighs

• 5 grams

• 50 grams

• 10 grams

• 15 grams

Multiple Choice

Bob puts 200 grams of ice into a pitcher with 900 grams of water. He gets distracted and comes back later to find that the ice has melted in the water. How many grams of water does Bob now have in the pitcher?

• 200 g
• 700 g
• 1,100 g

Multiple Choice

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Multiple Choice

In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 

• 4g
• 5g
• 9g
• 14g

Multiple Choice

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed

Mixtures and Solutions

• the combination of 2 or more substances

Multiple Choice

Which of the following is most likely the reason why the scientists stirred the solution at a high rate of speed?

• Stirring allows solvent to be dissovled
• Stirring allows solute to do the dissolving
• Stirring allows the solution to be unsaturated
• Stirring allows the solute to be more easily dissolved

Multiple Choice

__________ are made up of solutes and solvents.

• Solutions
• Suspension
• Colloid
• mixtures

Multiple Choice

Which of the following is NOT a mixture?

• sand, salt, and rocks in a bucket
• trail mix made with dried fruit,
  nuts, chocolate drops, and
  pretzels
• water in a glass
• rocks and sand in the ocean

Multiple Choice

To separate a mixture of salt and water what separation tool/method is used?

• Filter
• Screen
• Magnet
• Evaporation

Multiple Choice

the liquid a substance dissolves in

• solute
• solvent
• mixture
• solution

Multiple Choice

the substance to be dissolved in a liquid

• solute
• solvent
• dissolve
• mixture

Multiple Choice

To break down into tiny pieces to small to be seen.

• solute
• solvent
• dissolve
• solution

Multiple Choice

One or more substances dissolve in another and cannot be easily separated.

• mixture
• solution
• dissolve
• solute

Multiple Choice

A combination of two or more substances that can be easily separated.

• dissolve
• mixture
• solution
• physical property