Physical science Chapter 5

what are signs of physical changes?

• Change in color, shape or size
• Change in emotional state
• Change in temperature
• Change in weight

what is a chemical change?

• A change that alters the physical properties of a substance
• A change that occurs when a substance changes into a new substance with different properties
• A change that does not alter the chemical composition of a substance
• A change that only affects the state of a substance

what is an example of physical change?

• Burning of wood
• Digestion of food
• Baking a cake

• Melting of ice

what are some size dependant properties?

• Color, Shape, Texture
• Mass, Volume, Density
• Temperature, Pressure, Humidity
• Hardness, Elasticity, Plasticity

What are size independent property?

• Properties that change with the size of the object
• Properties that depend on the volume of the object
• Properties that depend on the mass of the object
• Properties that do not change with the size of the object

what are properties of acids?

• They are always solid
• They have a sour taste
• They are always liquid
• They are sweet

what are properties of bases?

• They taste sour
• They are slippery to touch
• They are always solids
• They can burn skin

what is the pH scale?

• A scale for measuring the acidity or basicity of a solution

• A scale for measuring the temperature of a solution
• A scale for measuring the color of a solution

• A scale for measuring the taste of a solution

what is physical weathering?

• The process of breaking down things with physical forces

• The process of breaking down rocks chemical reactions

• The process of breaking down rocks by weather conditions

what is chemical weathering?

• The process of rocks breaking down because of physical changes

• The process of rocks breaking down because of chemical reactions

• The process of rocks breaking down because of wind