# Science 7 – Strand 1

SOJO LIBRARY CATALOG

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Science Department

Strand 7.1: Forces interact with matter
Forces are push or pull interactions between two objects. Changes in motion, balance and stability, and transfers of energy are all facilitated by forces on matter. Forces, including electric, magnetic, and gravitational forces, can act on objects that are not in contact with each other. Scientists use data from many sources to examine the cause and effect relationships determined by different forces.

7.1.1 Carry out an investigation which provides evidence that a change in an object’s motion is dependent on the mass of the object and the sum of the forces acting on it. Various experimental designs should be evaluated to determine how well the investigation measures an object’s motion.Emphasize conceptual understanding of Newton’s First and Second Laws. Calculations will only focus along one-dimensional movement; the use of vectors will be introduced in high school.

7.1.2 Apply Newton’s Third Law to design a solution to a problem involving the motion of two colliding objects in a system. Examples could include collisions between two moving objects or between a moving object and a stationary object.

7.1.3 Construct a model using observational evidence to describe the nature of fields that exist between objects that exert forces on each other even though the objects are not in contact. Emphasize the cause and effect relationship between properties of objects (such as magnets or electrically-charged objects) and the forces they exert.

7.1.4 Collect and analyze data to determine the factors that affect the strength of electric and magnetic forces. Examples could include electromagnets, electric motors, or generators. Examples of data could include the effect of the number of turns of wire on the strength of an electromagnet, or of increasing the number or strength of magnets on the speed of an electric motor.

7.1.5  Engage in argument from evidence to support the claim that gravitational interactions within a system are attractive and dependent upon the masses of interacting objects. Examples of evidence for arguments could include mathematical data generated from various simulations.

Earthquakes LB 551.2 NAU

pg 4 (1:00) Earthquake damage (silent)

pg 6 – website – animations of earthquake terms

pg 12 (1:01) California 1906 (computer animation)

pg 18 (:59) Seismograph

Energy and Matter LB 530 JAC

pg 4 (3:20) What is Matter?

pg 8 – website – pitch drop experiment (longest running experiment)

pg 10 – website – types of matter

pg 12 (3:13) uniform circular motion

pg 16 – website rubber bands experiment – potential and kinetic energy

pg 18 (5:22) Nye – simple machines demonstration

pg 26 (3:26) James Clark Maxwell- Electricity and magnetism

pg 28 – website – (2:42) Fossil Fuels

pg 30 – website – (:59) Speed of sound explained

pg 40 (1:56) carbon dating

Forces and Motion LB 531 EVA

pg 4 (3:53) Bill Nye

pg 10 (1:59) Airplane taking off and landing

pg 14 – website – (4:25) Lego – Newton’s laws

pg 18 – slideshow – bridge forces

pg 20 (6:39) Career – Physicist

Gravity LB 531 WHE (K)

pg 4 (1:45) gravity – animated

pg 6 – slideshow – gravity

pg 8 (3:00) Brushing teeth of space

pg 12 (3:04) Plants and gravity

Ice 551.3 WHE (K)

8 (1:30) Hailstorm

pg 10 – website – disappearing glaciers

pg 14 – website – Landforms from glaciers

Magnetism LB 537 TIT

4 (2:41) Basics of magnets

pg 8 (5:11) Magnetic field (animated)

pg 8 – website -Earth’s magnetic field is weakening

pg 10 – document – Reversal of earth’s poles coming

pg 14 (4:31) Playing with magnets

pg 16 (43:33) Binary code and magnetism

pg 24 (4:42) Electric guitars

pg 30 (3:47) Elevators

pg 36 – document – Driverless cars

Mechanics LB 621 TIT

pg 20 – website – about vectors

pg 22 – website (7:16) Newton’s Laws on the International Space Station

Rocket (K) LB 629.45 ROC

pg 4 (2:07) Launching a rocket (thrust/chemistry)

pg 8 (3:20) Launching Space Shuttle Discovery

pg 12 (1:33) Launching Delta rocket