Grade 4 Mixed Review

Math

1. 100 7 multiplied by 8 Response: 56 Worked out from the numbers in the clue.
2. 200 The value of the 6 in 4,682 Response: 600 Worked out from the numbers in the clue.
3. 300 Three quarters written as a decimal Response: 0.75 Worked out from the numbers in the clue.
4. 400 The perimeter of a square with 5 cm sides Response: 20 cm Worked out from the numbers in the clue.
5. 500 The next number in 3, 6, 12, 24 Response: 48 Worked out from the numbers in the clue.

Science

1. 100 The gas people breathe in to stay alive Response: Oxygen All eukaryotic organisms, including plants, animals, fungi, algae, and most protists, need oxygen for cellular respiration, a process that extracts chemical energy by the reaction of oxygen with organic molecules derived from food and releases carbon dioxide as a waste product. Source: Wikipedia, “Oxygen”
2. 200 The process by which liquid water becomes water vapor Response: Evaporation Evaporation of water occurs when the surface of the liquid is exposed, allowing molecules to escape and form water vapor; this vapor can then rise up and form clouds. Source: Wikipedia, “Evaporation”
3. 300 The organ that pumps blood around the body Response: The heart The heart functions as a pump in the circulatory system to provide a continuous flow of blood throughout the body. Source: Wikipedia, “Heart”
4. 400 The force that pulls objects toward Earth Response: Gravity In everyday talk, we say things fall because the Earth's gravity pulls on them. Source: Simple English Wikipedia, “Gravity”
5. 500 An animal with a backbone Response: A vertebrate A vertebrate is an animal with a spinal cord surrounded by cartilage or bone. Source: Simple English Wikipedia, “Vertebrate”

Language

1. 100 The noun in the sentence: The rabbit hopped quickly Response: Rabbit Worked out from the words in the clue.
2. 200 A word that means the opposite of narrow Response: Wide Worked out from the words in the clue.
3. 300 The punctuation mark used at the end of a direct question Response: A question mark The question mark (also known as interrogation point, query, or eroteme in journalism) is a punctuation mark that indicates a question or interrogative clause or phrase in many languages. Source: Wikipedia, “Question mark”
4. 400 A comparison that uses like or as Response: A simile A simile is a figure of speech that compares two different things, usually by using the words 'like' or 'as'. Source: Simple English Wikipedia, “Simile”
5. 500 The past tense of teach Response: Taught Worked out from the words in the clue.

Geography

1. 100 The largest ocean on Earth Response: The Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. Source: Wikipedia, “Pacific Ocean”
2. 200 The continent where Brazil is located Response: South America Brazil, officially the Federative Republic of Brazil, is the largest country in South America. Source: Wikipedia, “Brazil”
3. 300 The imaginary line at zero degrees latitude Response: The Equator The latitude of the Earth's equator is, by definition, 0° (zero degrees) of arc. Source: Wikipedia, “Equator”
4. 400 The four main compass directions Response: North, south, east, and west The four cardinal directions or cardinal points are the four main compass directions: north (N), east (E), south (S), and west (W). Source: Wikipedia, “Cardinal direction”
5. 500 Land completely surrounded by water Response: An island An island is a piece of land that is surrounded by a body of water such as a lake, river, sea or ocean. Source: Simple English Wikipedia, “Island”

Social Studies

1. 100 A person who studies the past using artifacts Response: An archaeologist Archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. Source: Wikipedia, “Archaeology”
2. 200 A system in which citizens vote for their leaders Response: A democracy Today, the dominant form of democracy is representative democracy, where citizens elect government officials to govern on their behalf such as in a parliamentary or presidential democracy. Source: Wikipedia, “Democracy”
3. 300 A drawing that explains symbols used on a map Response: A map key or legend Legends define the meaning of the map's symbols, especially those that are not already intuitive or obvious. Source: Wikipedia, “Map layout”
4. 400 Money paid to a government to fund public services Response: Taxes A tax is a mandatory financial charge or levy imposed on an individual or legal entity by a governmental organization to support government spending and public expenditures collectively or to regulate economic activity through measures designed to mitigate negative externalities. Source: Wikipedia, “Tax”
5. 500 A first-hand record from the time being studied Response: A primary source Ideally, a historian will use all available primary sources that were created by the people involved at the time being studied. Source: Wikipedia, “Primary source”

Final round: Big Review

This word describes a change from liquid water to water vapor. Response: Evaporation Evaporation of water occurs when the surface of the liquid is exposed, allowing molecules to escape and form water vapor; this vapor can then rise up and form clouds. Source: Wikipedia, “Evaporation”