- how rapidly a quasar or any other light source fluctuates in brightness can allow us to estimate what property
of the object?how
it is. (choices: young, small, far, massive, charged, quickly spinning).

Explain how earth is like a giant bar magnet. how is our magnetic field made?

Iknow this isn't a question, but is there someway to ask a question under public safety or is there no category for it? i don't know if i'm overlooking it or not.

Panthers and leopards prey on deer in an ecosystem. for unknown reasons, the population of leopards increased drastically. what are the likely effects of this change on the species? 1. more food for panthers and more competition for leopards 2. less food and more competition for panthers 3. fewer deer and more competition for panthers 4. more food for deer and less competition for panthers and leopards 5. more food for leopards and less competition for panthers