Cards in this guide (20)
What is technology
Science applied to practical problems (Apex)
An isotope of cesium-137 has a half-life of 30 if 1.0 g of cesium-137 disintegrates over a period of 90 years how many g of cesium-137 would remain
1/8th of a gram.
You compute it like this: After 30 years, half of the original
amount would remain (1/2-gram). After another 30 years, half of
that half would remain (1/4-gram). After the remaining 30 years,
half of the 1/4-gram would remain, or 1/8-gram.
Wikipedia has a simple table and explanation as well:
How has technology changed farming
it has made daily tasks easier to complete
What is the responsibility of a scientist
to study the pyhsical world
to answer scientific questions accurately
Why is it important for scientist to state a conclusion
To clearly state why the experiment was performed
What is the purpose of genetically modified crops
Increasing food production
Which activity would be within the field of biology
Figuring out how pesticides affect plant growth is within the
field of biology.
How did scientists change society's view of smoking after 1960
-- they showed that smoking causes cancer :)
Which is a result of a seasonal change
Rabbits changing fur color APEX*
Does radiosotope 14c and 12c have the same number of protons
In a controlled experiment what is the experimental group compared to
What is the purpose of technology
What is true of an Arrhenius acid
An Arrhenius acid donates H+ ions. (apex).
What property should a radioactive used for dating have
its half life should be similar to the age of the fossil
What is the average for the following set of measurements 3.1mL 2.7mL 4.6mL 1.9mL 8.7mL
Average = Sum/Count = 21 mL/5 = 4.2 mL.
What will a hypothesis become if it is supported by repeat experimentation
A proven hypothesis becomes a theory.
Some technologies have a number of negative effects. Which is a negative outcome of the technology of vertical farming
rural farmers may lose their income
If scientists want to solve an environmental problem they are most likely to use .
Which question can be answered using the scientific process
How much water does it take to make a plastic bag
Which human activity negatively affects the stability of the environment
Cutting down all trees in a forest