Physical Science Words 03/18/2013

Question 1

Balanced Force

Answer 1

bal·anced force

• *Part of Speech:** noun
• *Own:** forces that are equal in all except direction; even
• *Dictionary:** forces that cancel each other out because they are equal in size
• *Antonym:** disproportioned; unbalanced force
• *Synonym:** equilibrium; equated

While it’s hard to comprehend, 100 pounds of feathers and 100 of bricks are balanced forces.

Question 2

Chemical Change

Answer 2

• a change in one or more substances, caused by a reaction, that forms new and different substances

Question 3

Compound

Answer 3

• a substance made of two or more different atoms that have combined chemically
• a substance formed by at least two types of atoms that are chemically combined

Question 4

Conduction

Answer 4

• heat transfer between two objects that touch

Question 5

Convection

Answer 5

• transfer of thermal energy by movement of a liquid or gas

Question 6

Density

Answer 6

• is found by dividing the mass of an object by its volume
• mass per unit of volume in a substance

Question 7

Dissolve

Answer 7

• when something breaks up into particles so tiny they can’t be seen even with a microscope
• when something is mixed into something else and disappears

- a substance mixed into something (liquid) to make a solution

Question 8

Element

Answer 8

• matter that is made of only one kind of atom

Question 9

Friction

Answer 9

fric·tion

• *Part of Speech:** noun
• *Own:** a rubbing or discord caused by difference
• *Dictionary:** a force that acts between two touching objects and that opposes motion
• *Antonym:** NONE
• *Synonym:** irritation; erosion

The friction between the magnifying glass and the grass created fire.

Question 10

Gravity

Answer 10

grav·i·ty

• *Part of Speech:** noun
• *Own:** the attraction between celestial bodies; forces of attraction
• *Dictionary:** the force of attraction between two objects, such as the attraction between Earth and objects on it.
• *Antonym:** weightedness
• *Synonym:** heaviness; weight

The gravity chamber at NASA was incredible.

Question 11

Inertia

Answer 11

in·er·tia

• *Part of Speech:** noun
• *Own:** unwillingness to move; stillness
• *Dictionary:** The property of matter that keeps it moving in a straight line or keeps it at rest
• *Antonym:** activity; moving
• *Synonym:** laziness; inactivity

You have to fight inertia if your car is in neutral.

Question 12

Mass

Answer 12

• the amount of matter in something

Question 13

Mixture

Answer 13

• a combination of two or more different substances in which the substances keep their identities\

- two substances physically combined and easy to separate

Question 14

Momentum

Answer 14

mo·men·tum

• *Part of Speech**: noun
• *Own:** force of speed of movement
• *Dictionary:** A measure of how hard it is to slow down or stop an object
• *Antonym:**
• *Synonym:** force; drive; thrust

The momentum at which he was running would have made a cheetah jealous.

Question 15

Parallel Circuit

Answer 15

Par·al·lel Cir·cuit

• *Part of Speech:** noun
• *Own:** consisting of or having component parts connected in the same direction
• *Dictionary:** an electric circuit that has more than one path for the electric charges to follow
• *Antonym:** Series Circuit
• *Synonym:**

The lights in my backyard run on a parallel circuit.

Question 16

Physical Change

Answer 16

• a change in which the form or shape of a substance changes but the substance still has the same chemical makeup

Question 17

Properties

Answer 17

• they are the characteristics used to describe or identify something

Question 18

Radiation

Answer 18

• transfer of energy in the form of waves
• transfer of thermal energy by electromagnetic waves

Question 19

Series Circuit

Answer 19

Se·ries Cir·cuit

• *Part of Speech:** noun
• *Own:** a circuit having its parts connected in order
• *Dictionary:** an electric circuit in which the electric charges have only one path to follow
• *Antonym:** Parallel Circuit
• *Synonym:** NONE

The entire school’s cafeteria runs on a series circuit.

Question 20

Solute

Answer 20

• the substance dissolved in a given solution

Question 21

Solution

Answer 21

• a mixture that has the same composition throughout because all the parts are mixed evenly
• a mixture that has the same composition throughout

- a type of mixture where one substance can be dissolved by another

Question 22

Solvent

Answer 22

• a liquid used to dissolve a substance
• a substance that dissolves another to form a solution

Question 23

Unbalanced Force

Answer 23

un·bal·anced force

• *Part of Speech:** noun
• *Own: f**orces that are unequal and are on an object; not even
• *Dictionary:** forces that cause a change in motion because they act on an object and don’t cancel each other out
• *Antonym:** balanced force; sound
• *Synonym:** irregular; unstable

The ocean waves cause an unbalnced force which makes floating objects sway in their direction.

Question 24

Velocity

Answer 24

ve·loc·i·ty

• *Part of Speech:** noun
• *Own:** speed of motion or action; swiftness
• *Dictionary:** An object’s speed in a particular direction
• *Antonym:**
• *Synonym:** acceleration; rapidness

He drove at such a high velocity, the car flipped over.

Question 25

Volume

Answer 25

• the amount of space a solid, liquid or gas takes up
• the amount of space something takes up