Matter
What is the unit of mass?
Grams
Mass= grams
What are the four magnetic metals?
nickel
iron
cobalt
steel
When pieces of yellow Lego bricks and blue Lego bricks are mixed together in a box, what happens to their physical properties? (Do they maintain or change their physical properties)
Maintain their physical properties
(mixture)
Name an example of a push and a pull:
push= shopping cart (away)
pull= using a wagon (pull)
When you plug a toaster into the wall and turn it on to toast bread, what primary energy transformation takes place?
What is mass and what tool do we use to measure it?
Mass is the amount of matter in an object.
Triple beam balance/scale
Which of the following items is soluble in water?
A- sand
B- honey
C- wood chips
D- plastic beads
B- honey
How would you best separate a mixture of small pebbles and water?
Use a filter/ strainer
strainer catches the pebbles and the water flows through.
What happens to an object's motion when unbalanced forces act on it?
A. it stays still
B. it disappears
c. It changes direction
C. changes direction
unbalanced= unequal= movement
When a television is turned on, electrical energy is transformed into which combination of energies?
light= see
and
sound = hear
What are the 3 states of matter?
Describe the shape and volume of each:
Solid- Definite shape and volume
Liquid- Indefinite shape and definite volume
Gas- Indefinite shape and volume
A solid block of wood floats on water, but a solid iron nail sinks in water. Why does this happen?
Wood is less dense than water
Nail is more dense than water
You accidentally spill a box of steel staples into a cup of dry sand. Which physical property and tool can you use to separate them easily?
Magnetism and magnetic
steel= magnetic
sand= non magnetic
On which of these surfaces would a toy car roll the farthest if you give it the exact same push every time?
a. gravel driveway
b. sand paper
c. wooden floor
c. wooden floor
smooth= less friction
A string of holiday lights is wired in a series circuit. One light bulb burns out and breaks. What will happen to the rest of the lights on the string?
The whole circuit is broken.
Open= broken
To find the volume of a liquid like water or juice, which laboratory tool is most appropriate?
Graduated cylinder
Which material is an example of a good thermal and electrical conductor?
a- rubber band
b- paper towels
c- copper wire
d- wooden spoon
copper wire
If you dissolve salt in water, the salt seems to disappear. If you want to get the solid salt back out of the water, what separation method and tool should you use?
Evaporation/ hot plate
Two teams are playing tug-of-war. They are pulling with all their might, but the center ribbon on the rope does not move an inch. What can you say about the forces? (equal or unequal forces)
equal forces= balanced= no movement
An electric desk fan uses electricity to spin its blades and create a cool breeze. What energy transformation is occurring here?
electricity to mechanical
mechanical= movement
If you pour 200 milliliters of milk from a tall, thin glass into a wide, short bowl, what happens to the volume and shape of the milk?
The volume stays the same (200 ml) the shape changes and takes the shape of the short bowl
Why are plastic or rubber coatings placed over metal electrical cords?
Plastic and rubber are insulators. Insulators stop electricity. The plastic and rubber are used for protection of electrical shocks.
What makes a solution different from other types of mixtures?
Solution= Hard to separate, changes physical properties, 1 ingredient dissolves
Mixture= maintains physical properties, easy to separate
Name all 3 variables and what they mean:
Independent variable= change
dependent variable= measure
constant variable= stay the same
Name all the types of energy we learned about and their key words :
Chemical= in batteries
Mechanical= movement
Electrical= plug in
Light= see
Thermal= heat
Sound= hear