Revision Set 1 (MrD)
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- A _____ is a combination of elements.
- compound
- A change in temperature means a change in _____.
- energy
- A solution is a compound. T/F?
- False
- Baking a cake is a physical change. T/F?
- False
- Boiling occurs when a _____ changes to a _____ at boiling point.
- liquid, gas
- Carbon dioxide is a compound. T/F?
- True
- Changing a liquid to a solid is called _____ or _____.
- freezing, solidification
- Changing a solid to a liquid is called _____.
- melting
- Chemical changes cannot usually be _____.
- reversed
- Chemical changes produce _____ substances with _____ chemical properties.
- new, new / different
- Concrete is an example of a _____.
- mixture
- Elements are _____ substances.
- pure
- Elements are pure substances made up of only _____ kind of atom.
- one
- Evaporation occurs when a _____ changes to a _____.
- liquid, gas
- Gases have no fixed volume. T/F?
- True
- How many atoms of nitrogen does dinitrogen tetroxide have?
- two
- How many atoms of oxygen does carbon monoxide have?
- one
- How many atoms of oxygen does dinitrogen tetroxide have?
- four
- In _____ the particles can only vibrate.
- solids
- In compounds, the elements are in _____ proportions.
- fixed
- In mixtures, substances can be mixed in different _____.
- proportions
- Is air an element, compound or mixture?
- mixture
- Lipstick is a compound. T/F?
- False
- Liquids can be compressed. T/F?
- False
- Melting an ice cube with a Bunsen is a chemical change. T/F?
- False
- Mixtures are several different _____ mixed together.
- substances
- Mixtures can be separated by simple means. T/F?
- True
- Name a metal which is a liquid at room temperature.
- mercury
- Name three magnetic metals.
- iron, nickel, cobalt
- Permanent colour change is evidence of a _____ change.
- chemical
- Physical changes cannot be reversed. T/F?
- False
- Reacting iron and sulfur together is a _____ change.
- chemical
- Rusting a nail is a chemical change. T/F?
- True
- Sharpening a pencil is a physical change. T/F?
- True
- Silver and Gold are both _____.
- elements / pure substances / metals
- Solidification occurs when a _____ changes to a _____.
- liquid, solid
- The elements that make up hydrogen sulphide are _____ and _____.
- hydrogen, sulfur
- The elements that make up phosphorus pentachloride are _____ and _____.
- phosphorus, chlorine
- The prefix “di-†means _____.
- two
- The prefix “hexa-†means _____.
- six
- The prefix “mono-†means _____.
- one
- The prefix “penta-†means _____.
- five
- The prefix “tetra-†means _____.
- four
- The prefix “tri-†means _____.
- three
- To melt a solid, _____ must be added.
- heat
- Uranium is a _____ element.
- radioactive
- What are the three states of matter?
- solid, liquid, gas
- When a gas condenses it turns into a _____.
- liquid
- Who is your favourite Year 9 Science teacher?
- Mr Dennis!
- In liquids, the particles can _____ past each other.
- flow
- In gases, the particles move in _____ lines at high _____.
- straight, speed
- Solids cannot be compressed. T/F?
- True
- Gases can be compressed. T/F?
- True
- Grinding a substance into powder is a _____ change.
- physical
- Name the two elements that make up water.
- hydrogen and oxygen
- Burning is a _____ reaction.
- chemical
- Bubbles of _____ may indicate a _____ change.
- gas, chemical
- Taste and odour are examples of _____.
- properties
- Atoms and molecules can be thought of as tiny _____.
- particles
- Name a non-metal which is a solid at room temperature.
- iodine