WHAT DO YOU REMEMBER?!

Science 1st 9 Weeks Review

SCIENTIFIC INVESTIGATION 3.1

Review Slides 3- 42

_______ is a statement written in a manner that describes the cause and effect relationship between the independent variable and dependent variables in an experiment .

hypothesis

Observations are made using the ________.

5 senses

What does a magnifying glass do?

Enhances the vision of an item

_________ are statements of what is expected to happen in the future based on past experiences and observations.

Predictions

A ____________ is a tentative explanation based on background knowledge and available data.

inference

A ____________ is a summary statement based on the results of an investigation.

conclusion

In science, it is important that experiments and the observations recorded are replicable. What does this mean?

Replicable = can repeat

_____________ data deals with descriptions and data that can be observed but not measured precisely.

qualitative

_________ data can be counted or measured and the results can be recorded using numbers. Can be represented visually in graphs and

charts. More valuable in science because they

allow direct comparisons between observations

Quantitative

QUALITATIVE OR QUANTITATIVE?

Friendly Like science Positive about school work

Qualitative

QUALITATIVE OR QUANTITATIVE?

25 students 10 boys, 15 girls 68 percent have perfect attendance

Quantitative

The amount a container can hold. The amount of space occupied by an

object.

volume

The distance between 2 points.

length

A body of matter with no specific shape.

mass

A metric unit of mass equal to 1 thousandth of a kilogram

gram

The measure of the amount of thermal energy in the atmosphere

temperature

Metric unit for measuring temperature On this scale, water freezes at 0

degrees Water boils at 100 degrees

Celsius

A number representing a specific point in hours, minutes, and seconds

time

A unit of time equal to 1 sixtieth of an hour

60 seconds

minute

This is when we put natural events in a sequence that allows us to notice change over time. (life cycles, moon phases, tidal changes)

Natural events sequenced chronologically

SIMPLE MACHINES 3.2

Review Slides 44- 75

Simple machines make work ___________.

easier

A stiff bar that moves about a fixed point (fulcrum).

It is used to push, pull, or lift things.

lever

A flat surface that is raised so one end is higher than the other.

Helps move heavy objects up or down.

Inclined plane

Wide at one end and pointed at the other.

Helps cut or split other objects.

wedge

A rod attached to a wheel. Makes it easier to move or turn things.

Wheel and axle

An inclined plane wrapped around a cylinder or cone.

Holds objects together.

screw

A wheel that has a rope wrapped around it.

Used to life heavy objects by changing the direction or amount of force.

pulley

Seesaw Crowbar shovel

lever

ramp

Inclined plane

Knife ax

wedge

Bicycle wheels roller skates doorknob

Wheel and axle

Jar lid Wood screw

screw

Flagpole Venetian blinds

pulley

A ______________ is a combination of 2 or more simple machines.

Compound machine

Bicycle Wheelbarrow Scissors

Compound machine

Which kind of work is made easier by the wheels of a wagon?

Pulling a heavy load

MATTER 3.3

Review Slides 77- 86

_______________ remain the same even if the visible material is reduced in size.

Examples: color, texture, phase, temperature, ability to dissolve in water

Physical properties

Ice cubes are an example of which form of water?

solid

Which of these dissolves in water? A. Sand grains B. Sugar cubes C. Plastic straws D. Wooden spoons

B. Sugar cubes

Every object that takes up space is made of __________.

matter

Observable characteristics that enable one to differentiate objects

Physical properties