Tides
- Tides refer to the daily rising and falling levels of the oceans' surfaces. - They are caused by the gravitational pull of the moon and the sun on the ocean. - The tide rises and falls twi...
Notes tagged with "jc science".
- Tides refer to the daily rising and falling levels of the oceans' surfaces. - They are caused by the gravitational pull of the moon and the sun on the ocean. - The tide rises and falls twi...
When carrying out scientific investigations scientists usually form an initial idea to explain their observations. The initial idea is knows as a hypothesis. A hypothesis is tested by making...
Three of the most common ways to investigate hypotheses are controlled experiments, observational experiments and modelling. Controlled Experiments A controlled experiment is a test that in...
- Astronomers have observed that other galaxies are moving away from ours at great speed. - Based on these observations, astronomers concluded that the universe is expanding. - They then dev...
- We experience night and day because Earth rotates on its own axis. - At any one time only half of Earth is facing the sun. - While one half of the planet is in daylight the other half is i...
Agriculture can threaten biodiversity in many ways. Three examples are: - Monoculture. - Overuse of herbicides and pesticides. - Overuse of fertilisers.Monoculture - Monoculture is an agri...
Heat Waves and Droughts: - Water shortage. - More deserts are formed. - Extreme heat can kill humans. - Crops can't grow{food shortages}.More Violent Storms: - Flooding. - Homelessness. - ...
- Length is the distance from one point to another. - The SI unit of length is a metre{m}. - Other units of length are millimetres{mm}, centimetres{cm}, kilometres{km}. - A ruler or a metre ...
The relationships within ecosystems include: - Adaption. - Competition. - Interdependence.Adaption - An adaption is a characteristic that improves the chances of an organism surviving with...
- A food chain is a sequence of organisms where each one is eaten by the next. - Each time an organism is eaten, the matter and energy it contains passes to the organism that eats it. - Many...