Blog

The diagram below shows the electrons in two pairs of atoms. Which of these conclusions is most likely correct about the two pairs of atoms? (2 points)

Avoiding bias, increases reliability and is important to experimental data. A scientist is investigating the cause of an unusual color in the lake water of a specific location. Four residents of the location responded to questions asked by the scientist. The chart below shows their responses.   Questions Resident 1’s answer Resident 2’s answer Resident 3’s answer Resident 4’s answer Do you work at the coal mine near the lake? Yes No No Yes Do you use the lake water for daily chores? Yes Yes No Yes Is your family income affected by the presence of the coal mine near the lake? No Yes No Yes Which resident’s information is the least biased and the scientist most likely to get valid results? (2 points)

The table below shows the temperature of water in two bowls. Name of bowl Temperature of water in bowl Bowl 1 315 Kelvin Bowl 2 86 degrees Fahrenheit What is the difference between the temperatures of water in the two bowls? (2 points)

One group of students is investigating the properties of the bar magnet shown below. The students took a bowl of iron nails, plastic pieces, wood shavings, and paper pieces. The bar magnet was placed inside the bowl for some time and then taken out. Several iron nails were stuck on the bar magnet. The experiment was repeated by several students using different bar magnets. Based on the investigations, which of these theories would the students most likely propose? (2 points)

A pipe is used to fill a fish tank which can hold 30 gallons of water. The pipe supplies 58 liters of water per hour. If 1 liter of water is equal to 0.26 gallons of water, which of these conclusions is correct about the fish tank? (2 points)

This box and whisker plot shows the time taken by two groups of students to solve a science problem. Based on the graph, which of these statements is correct? (2 points)

The picture below shows a pot of water being heated on a flame. The heat from the flame is transferred to the surface of the water through the process of (2 points)

The diagram below shows the electrons in two pairs of atoms. Which of these conclusions is most likely correct about the bonds between the two pairs of atoms? (2 points)

An old theory about the position of planets and the sun in the galaxy has been replaced by a new theory. Which of these statements is correct about the two theories? (2 points)

A group of students measured the average monthly temperature of 1000 cities around the world and plotted the cumulative frequency graph shown below. Based on the graph, it can be concluded that (2 points)