Question

Which do scientists study to determine air temperature at the time it was formed? Select the two correct answers. (1 point)
Responses

fossilized pollen
fossilized pollen

ice formed thousands of years ago
ice formed thousands of years ago

tree rings
tree rings

chemical isotopes in foraminifera shells
chemical isotopes in foraminifera shells

Answer 1

The two correct answers that scientists study to determine air temperature at the time it was formed are:

1. **Ice formed thousands of years ago** - Ice cores can contain trapped gas bubbles that reflect the atmospheric conditions, including temperature, at the time the ice was formed.

2. **Chemical isotopes in foraminifera shells** - Foraminifera are small marine organisms whose shells contain isotopes that can provide information about the temperature of the ocean water when they were formed.

So the correct responses are:

- Ice formed thousands of years ago
- Chemical isotopes in foraminifera shells