Fichas
Ideas about Science
Fichas del conjunto (22)
- 1Why aren't opinions reliable data?Because they can't be repeated or reproduced by other scientists, so they can't support a hypothesis
- 2Give two reasons why repeated measurements might vary1. Human error
2. Change in conditions - 3Why does repeating measurements lead to a better estimate of the quantity?Because it factors in the variation within results. They should cancel each other out
- 4Explain why it is important to control all other factors within an experimentTo ensure that the only factor affecting the outcome is the one being studied
- 5Under what circumstances is a correlation declared between an outcome and a factor?1. If the outcome occurs when a specific factor is present and not when it isn't present
2. If the outcome variable increases as the input variable increases - 6In some circumstances, a factor does not invariably lead to an outcome. What happens instead?It alters the chance or probability of an outcome
- 7What is the relationship between a hypothesis and data?A hypothesis is based on data but is distinct from it
- 8Since an explanation cannot be deduced from data, what is required?Creative thinking
- 9What will increase confidence in a hypothesis?Agreement between a prediction and observation
- 10Give two conclusions from a disagreement between a prediction and an observation1. One or the other is wrong
2. We doubt the explanation on which the prediction is based - 11Give two ways in which a sample can be made fair1. It is chosen randomly
2. The samples can be matched in all factors but the one being investigated - 12Under what circumstance is a scientist willing to accept that there is a correlation between two factors?If there is a plausible mechanism linking the two
- 13Two two ways in which scientists report their claims1. Conferences
2. Journals - 14Why are scientists sometimes sceptical about claims?Sometimes results can not be repeated or reproduced
- 15Give three reasons for why a scientist's explanation might be different from others1. Interest
2. Experience
3. Personal background - 16Why are older theories usually accepted over new ones?1. It has been repeatedly tested
2. It already explains many observations - 17Give an example of a risk that has arisen from new technologyPossible radiation from mobile phones
- 18Give two things that must be considered about a particular risk1. The chances of it happening
2. Its consequences - 19Give two instances in which a person is more willing to accept a risk1. If they have chosen so
2. If the risk is short-lived - 20Give two reasons for why somebody might overestimate a risk1. If the effect is invisible or long-term
2. If the action is unfamiliar - 21Why is government-regulated risk viewed as controversial?Sometimes those most at risk are not those who benefit
- 22State three unintended human impacts on the environment1. Population growth
2. Use of non-renewable resources
3. Pollution
Información
- Descripción
- Fichas sobre Ideas about Science, creado por Joe Allen el 08/06/2015.
- Creado por
- Joe Allen
- Visitas
- 2
- Valoración