Pruebas del III Parcial

Prueba 1

Septimo A y B

Jueves 5 de Febrero

Contenido

Capitulos 11, 12 y 13.

paginas: 200-242. S86-S93

Study Guide

1. What is matter? Anything that has mass and occupies space.

2. How can matter be identified? By its properties.

3. List the three properties of matter: Chemical, physical, and biological.

4. What are biological properties? Characteristics of matter that are unique to living things. example: growth, reproduction, etc.

5. What are chemical properties? property that describes how that kind of matter interacts with other kinds of matter. Describe a situation in which the identity of matter is changed. Example. burning paper, eggshell dissolving in vinegar, and turning brown (apple) when exposed to air).

6. What are physical properties? property of matter that can be observed by your senses without altering the composition of the matter. Example: rearing a piece of paper.

7. Explain the two ways physical properties can be.

-Describing the matter itself, like shape, color, etc.

-Describing how the matter changes like sugar dissolved in water.

8. What is molecule? The smallest particle of a substance, that is still identifiable as that substance.

9. How are the properties useful? The properties of a material determine its use.

10. SI: Systeme Internationall d' Unites. Based on multiples of 10. Practice conversions.

11. What is volume? The amount of space occupied by matter. The amount of space inside a hollow object.

12. What is the displacement method? A method that measures the volume of an object by measuring the amount of liquid that it displaces in a container.

13. What is density? The mass of a material per unit of volume.

14. What is Mass? A measure of the amount of matter in an object (amount of matter a substance contain: mass is constant).

15. What is weight? Is the downward force exerted by an object due to gravity. the weight i no constant because gravity change according the location. The weight is the mass multiplied by gravity.

16. List the unit of measuring mass and weight. Mass: kilograms and gram. Weight: Newtons.

18. List the four states of matter: Liquid, Solid, Gas, and Plasma.

19. Describe how the molecules interact in each state of matter:

Liquid: Molecules can change position and move past each other. Molecules move about freely, but they are held close together by attractive forces.

Solid: Molecules are close together in a fixed pattern. Strong attractive forces lock the molecules in a place.

Gas: Molecules are spread far apart. Molecules move about randomly with large spaces between them.

Plasma: Molecules have been broken down into electrically changed particles.

20. Mention the six changes of state:

Solid to liquid: Melting or liquefaction.

Liquid to solid: Solidification, or freezing.

Liquid to gas: Vaporization and evaporation or boiling

gas to liquid: Condensation and liquefaction

solid to gas : Sublimation or vaporization

gas to solid : solidification or crystallization

All mater, gases, liquids, and solids have volume. True.

The mass of the Earth is 6 sextillion ton. ( 6,000,000,000,000,000,000,000). True.

Ligtht year is the distance that light travel on one year, which is 9.46 billion of km. True.

Light travel 300.000km/sec. True.

The gravitational force exerted on the moon is one sixth that exerted by the Earth. True.

A change of state is a physical change. True.