Science 8 - STAAR Semester 1 Review

What element is represented by the Bohr model?

Group number is used to show the number of valence electrons. How many does chlorine have?

What is the force of an object with a mass of 100 kg and an acceleration of 4 m/s²

How many atoms and elements are in the chemical formula BaC₂O₃N₄

What is the charge of the nucleus of sodium (Na) with +11 protons and 12 neutrons?

On the periodic table, what is the atomic mass of Nitrogen, and how many neutrons does it have?

In the food web, what organisms are herbivores?

Mosquitoes suck! What type of symbiotic relationship do they have with most organisms?

According to the HR-diagram, which type of star is the brightest and hottest?

If an atom has 50 protons and an atomic mass of 119, what is the number of neutrons?

What does the atomic number tell you about an element?

Which 2 elements have similar chemical properties, such as valence electrons and ionic charge?

What type of spectral wave has a wave length of 10^-2 meters and frequency of 10⁹ hertz?

What land form below is not created by a converging plate boundary?

What evidence was NOT used to show the theory of continental drift and plate tectonics?

Which of the following environmental factors is abiotic?

What unit is used to measure distance in space?

If a new virus kills most of the carrots, what will happen next in the food web?

Which Newton law of motion is describing inertia?

Which direction will a river flow from the top of this hill?