The bar graph compares rainfall totals for April (45 mm), May (62 mm), June (80 mm), and July (55 mm). May's bar at 62 mm is closest to 60 mm, as it's only 2 mm above while others differ more. This is correct because comparing bar heights to the target value identifies the nearest, demonstrating bar graph comparison. Option C, July at 55 mm, is close but farther from 60 than May.

The graph depicts bacterial population doubling every 2 hours, from 1 at 0 h, to 2 at 2 h, 4 at 4 h, 8 at 6 h, and 16 at 8 h. Extrapolating the trend to 10 h gives 32 million cells, as it doubles from 16. This is correct because continuing the pattern assumes the same growth rate, illustrating extrapolation from graphs. Option C, 24 million, might result from adding instead of multiplying.

The graph shows the temperature of the cooling rod decreasing over time, with the curve passing through points like (0, 200), (5, 120), (10, 85), (15, 65), and (20, 55). To find the temperature at 10 minutes, follow the x-axis to 10 min, go up to the curve, and read across to the y-axis, which gives approximately 85 °C. This is correct because the graph directly indicates 85 °C at that point, demonstrating how to read a specific value from a line graph. Option C, 65 °C, might be chosen if someone misreads the time as 15 minutes instead.

The scatter plot shows cart speed increasing with ramp angle, with points clustering around (5, 0.6), (10, 1.0), (15, 1.4), (20, 1.9), (25, 2.3), and (30, 2.8). The overall trend is a steady rise, best described as speed generally increasing as ramp angle increases. This is correct because the pattern of points demonstrates a positive correlation, illustrating how to interpret trends in scatter plots. Option D might mislead if someone sees a false peak at 15° due to not viewing the full trend.

The Desert habitat had the fewest insects observed according to Figure 1. Comparing the bar heights for all five habitats (Field, Forest, Pond, Garden, Desert), the Desert bar is clearly the shortest, indicating the lowest insect count during the 1-hour survey period.

The speed at $1.5 , \text{s}$ is closest to $15 , \text{m/s}$. To find this value in Figure 1, locate $1.5 , \text{s}$ on the x-axis, interpolate between the plotted points on the increasing trend line, then read across to the y-axis. The linear relationship shows speed increasing uniformly with time for the falling object.

The bar graph displays mean insects per trap for four habitats, with bar heights at Forest 18, Grassland 12, Wetland 25, and Urban 9. The highest bar is for Wetland at 25, indicating it had the highest mean capture. This is correct because comparing bar heights directly shows Wetland exceeds the others, teaching how to identify maxima in bar graphs. Option A, Forest, might be selected if someone confuses it with the second highest.

The correct answer is B (decreased only). All four oil curves in Figure 1 slope consistently downward from left to right — as temperature increases from 20°C to 80°C, drop time decreases for every oil tested. This is consistent with the passage's introduction, which states that viscosity decreases as temperature increases, and since lower viscosity means the ball falls faster, drop time decreases. A (increased only) and C (increased, then decreased) are contradicted by the uniformly downward-sloping curves. D (remained constant) would require flat horizontal lines, which is not shown. On trend questions, check all curves to confirm the trend is consistent — here all four oils show the same directional pattern.

The correct answer is A. Figure 1 shows temperature decreasing with altitude in two layers: the Troposphere (from 15°C at the surface down to −60°C at 12 km) and the Mesosphere (from 0°C at 50 km down to −90°C at 85 km). The Stratosphere shows increasing temperature with altitude (−60°C to 0°C), as does the Thermosphere (temperature increases rapidly above 85 km). B is wrong because both the Stratosphere and Thermosphere show temperature increasing with altitude. C is wrong because the Stratosphere shows temperature increasing, not decreasing. D is wrong because the Thermosphere shows temperature increasing. Pro tip: Read each layer's description carefully and classify it as either warming or cooling with altitude before looking at the answer choices.

The correct answer is B. An altitude of 30 km falls within the Stratosphere (12–50 km), where temperature increases from −60°C at 12 km to 0°C at 50 km. At 30 km, which is roughly the midpoint of this layer, the temperature is approximately −40°C. A (−80°C) is too cold — that value is closer to the Mesopause at 85 km. C (0°C) is the temperature at the Stratopause (50 km), not at 30 km. D (15°C) is the surface temperature at sea level. Pro tip: On atmospheric layer questions, first identify which layer the altitude falls in, then use the layer's temperature range to narrow your answer.