If two atoms are isotopes of the same element, what will they have the same number
of? What will they have a different number of?
same number of protons; different number of neutrons
O same number of neutrons; different number of electrons
same number of neutrons; different number of protons

same number of protons

They'll have the same number of protons and a different number of neutrons

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

straight probes are used primarily for measuring flow as it is approaching the test area. its geometry allows the probe to be mounted so that it is in the direct line of airflow.