Which of the following statements about the solar system's formation is true?

1. the temperature was very cold
2. gravity pulled together a cloud of gas and dust
3. objects formed from the same materials
4. the planets formed at the same distance from the sun

You and a group of friends are spending your vacation hiking through the mountains. it is cold in the mountains. you will be expending a lot of energy while hiking and you will need plenty of energy to keep you warm. you should pack foods high in to provide the most energy or kilocalories per gram of food. a) carbohydrates b) lipids (fats) c) proteins d) sugars