Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Science Unit Test 3
| Question | Answer |
|---|---|
| What are some of the uses of water? | We use water for drinking, for entertainment purposes, to put out fires with and to water crops with…etc. |
| What is the chemical composition of water? What does a molecule of water look like? | Each molecule of water contains 2 Hydrogen atoms and 1 oxygen atom. |
| On average, how much of the human body is made up of water? | >50% |
| What is a solvent? What are some examples of substances that dissolve in water? | A solvent is a substance that can dissolve other substances. Water is a solvent. Salt, sugar…etc. |
| What does pure water look like, smell like, and taste like? | It is clear, has no smell, and has no taste. |
| Why does most water in nature have a colour, smell, and taste? | Because water contains minerals and other deposits that give it a colour, smell, and flavour. |
| What is water used for in the human body? | Helps to transport substances through the body, A component of sweat, Forms saliva, Etc. |
| How does sweat help to keep the body cool? | Water helps to keep the human body cool. As sweat evaporates, it transfers thermal energy away from the body. |
| Water is the most dense when it is in what state? How do you know? | Water. Ice floats in water because ice (a solid) is less dense than liquid water. |
| What is the water cycle? | The water cycle is a continuous pattern in nature in which water moves as it changes state above, on, and below the surface of Earth. |
| Energy is required to power the water cycle. Where does this energy come from? | The sun. |
| What is thermal energy? | Heat energy. |
| What is melting? Does it require an input of thermal energy or a loss of thermal energy? Provide an example of melting. | Melting is when a solid changes into a liquid. It needs an input of thermal energy. An example is an ice cube melting in the sun. |
| What is freezing? Does it require an input of thermal energy or a loss of thermal energy? Provide an example of freezing. | Freezing is when a liquid turns into a solid. It happens when thermal energy is lost. An example is lakes turning into ice during cold winter weather. |
| What is evaporation/vapourization? Does it require an input of thermal energy or a loss of thermal energy? Provide an example of freezing. | Evaporation/vaporization is when a liquid changes into a gas. It requires an input of thermal energy. An example is water in a container slowly decreasing when left in the sun. |
| What is condensation? Does it require an input of thermal energy or a loss of thermal energy? Provide an example of freezing. | Condensation is when a gas changes into a liquid. It happens when thermal energy is lost. An example is dew forming on grass overnight. |
| What is deposition? Does it require an input of thermal energy or a loss of thermal energy? Provide an example of deposition. | Deposition is when a gas turns directly into a solid. It happens when thermal energy is lost. An example is frost forming on windows in winter. |
| What is sublimation? Does it require an input of thermal energy or a loss of thermal energy? Provide an example of sublimation. | Sublimation is when a solid changes directly into a gas. It requires an input of thermal energy. An example is snow shrinking over time without visibly melting. |
| What is runoff? | Runoff is water from rain or melting snow that flows over land and moves into places like rivers or lakes (for example, water moving from a field into a river). |
| What is surface water? | Surface water refers to water on the surface of the Earth. |
| What is groundwater? | Groundwater is water found below the surface of the Earth. |
| What is an aquifer? | An aquifer is an underground layer of rock and soil that is soaked with water. |
| What is the water table? | The water table is the top level of an aquifer. It rises and falls depending on factors like rain, drought, and seasons. |
| What is heat capacity? | Heat capacity is how much thermal energy is needed to raise 1 g of a substance by 1°C. Higher heat capacity means the substance heats up more slowly even when it absorbs energy. |
| Which has a higher heat capacity? Water or land? What does this mean in terms of how much thermal energy is required to increase or decrease the temperature of water vs. land? | Water has a higher heat capacity than land. This means water needs more thermal energy to change its temperature (heat up or cool down). Land changes temperature faster it has a lower heat capacity. |
| What are heat sinks? | A heat sink is something that absorbs thermal energy without changing state or getting much hotter. Large bodies of water like lakes act as heat sinks. |
| What are convection currents? | Convection currents is another term for wind. Hot air rises while cool air falls, causing air movements. |
| What is the difference between climate and weather? | Climate is the average weather conditions in a place over a long time. Weather is the short-term conditions like temperature, rain, wind, and humidity from day to day. |
| Explain how distance from a large body of water may affect the average temperature range and precipitation in a particular area. | Areas near large bodies of water have smaller temperature changes because water heats up and cools down slowly (it acts like a heat sink). This also leads to more precipitation because more water evaporates and falls nearby as rain or snow. |
| How does global warming (i.e, The increase in the average global temperature) lead to rising sea levels? Name 2 mechanisms. | Mechanism 1: Melting ice caps and glaciers add extra water to the oceans, increasing sea levels. Mechanism 2: Thermal expansion—when ocean water warms, it expands (takes up more space), which also raises sea levels. |
| What is a watershed? | An area of land where all of the water in that area drains into the same place (i.e., a lake, the ocean…etc.) |
| What is the purpose of a watershed? | Watersheds capture water, filter it, and then release it into ever larger bodies of water |
| What is the difference between a closed and an open watershed? Are most watersheds in Canada closed or open? | A closed watershed keeps water inside it—water can only leave by evaporating, not by flowing to the ocean. An open watershed lets water flow out and eventually reach the ocean. Most watersheds in Canada are open. |
| Why can what happens in one watershed affect another watershed? Give some examples of how one watershed can affect another. | Water in watersheds is connected, so pollution can spread. For example, fertilizer from a farm can wash into a river and end up in a lake, where it can harm fish and other life. |
Created by:
user-1989313