Week 6 - Pnysical Sciences 1

Question 1

What type of compound is water?

Answer 1

Polar compound

Question 2

Dissolving

Answer 2

For a liquid to dissolve a solid, the compounds of a liquid and solid must attract one another

Water compound attract the negative and positive areas on the polar sugar compounds

The sugar dissolves because they separated from the other compounds and mix into the water

Question 3

Saturation

Answer 3

A solution has the maximum amount of solute that can be dissolved

To saturate something - the solution needs to be heated

Question 4

How can heat me transferred

Answer 4

You can not add ‘cold’ to an object - heat flows into the cold object and vice versa until both at the same consistent temperature

Question 5

What is energy

Answer 5

Energy is the ability to do work

When energy is converted from one form to another, work is done

Question 6

What is heat energy and types

Answer 6

The internal energy associated with the movement of atoms and molecules in the matter - heat is the ability of atoms to do work

Conduction

Convection

Radiation

Question 7

Conduction

Answer 7

Transfer of heat energy between substances that are in direct contact with each other

Question 8

Convection

Answer 8

Up and down movement of gases and liquids caused by heat energy transfer - matter moves from the warmer area to colder area - repeating of cycle

Question 9

Radiation

Answer 9

Heat energy is transmitted without any physical contact between objects - transmitted without any physical contact between objects

Question 10

Temperature

Answer 10

Not the same as heat

Heat is measurement of energy

Temperature is an average heat or thermal energy in a substance

Question 11

What is boiling

Answer 11

A consist movement of heat molecules and energy

Question 12

Two different types of forces

Answer 12

Contact
Physical pushes, friction (air or water resistance), force from wind

Non contact
Gravity, magnetic forces, electrostatic forces

Question 13

What is normal force?

Answer 13

The force exerted on an object that comes to contact or is stable with another object

Question 14

Opposite attraction

Answer 14

Positive and negative charges will attract and pull towards each other

Things with the same charge (two positive and two negative) will repel or push away from each other

Question 15

Magnets properties

Answer 15

Magnets are dipolar (2 poles north and south)

N pole away attracts the South Pole (force of attraction)

S pole repels the s pole (force of repulsion)

The n pole repels the n pole (force of repulsion)

Question 16

Frictional forces

Answer 16

When one surface rubs on another

Friction slows things down or stops movement
Where two smooth surfaces are in contact the amount of friction is low
Where two rough surfaces are in contact the amount of friction is high