*Question*
Weathering means breaking down rocks from larger whole into smaller pieces by weather, and igneous rocks are made from lava that hardens. Given these facts, weathering means breaking down what from larger whole into smaller pieces by weather among the following options: - objects that have mass - Something made from lava - Something made from water - movement of tectonic plates - Something formed from skeleton - A solid geometric shape - Something made from wind - Something made from metal
**Answer**
Something made from lava

*Question*
Mammals conserve body heat with their hair or fur, and hair and feathers are both made of keratin. Given these facts, what do mammals use to conserve body heat among the following options: - four limbs - Energy. - energy - sarcasm - skin - keratin - sawdust - groceries
**Answer**
keratin

*Question*
Cell division often causes growth, and growth of the cell normally means reproduction. Given these facts, what leads to reproduction among the following options: - Pollen grains - flowers - Cell division - They lay eggs - haploid plants - some invertebrates - spread flower seeds - genetic diversity
**Answer**
Cell division

*Question*
Vertebrates are animals that have a backbone, and trunk muscles are the muscles of abdominal wall, thorax, backbone and pelvic cavity. Given these facts, vertebrates are animals that have what among the following options: - strength - tentacles - Something to move - tree muscles - animal suits - trunk muscles - Epidermis - aerobic capacity
**Answer**
trunk muscles